UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D. C. 20549


                                    FORM 10-Q


                Quarterly Report Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934

                  For the quarterly period ended March 31, 2001


                          Commission File No. 33-3353A


                           PARKER & PARSLEY 86-A, LTD.
             (Exact name of Registrant as specified in its charter)


                       Texas                               75-2124884
           --------------------------------           ---------------------
           (State or other jurisdiction of              (I.R.S. Employer
           incorporation or organization)             Identification Number)


1400 Williams Square West, 5205 N. O'Connor Blvd., Irving, Texas      75039
- ----------------------------------------------------------------    ---------
             (Address of principal executive offices)               (Zip code)


       Registrant's Telephone Number, including area code : (972) 444-9001

                                 Not applicable
              (Former name, former address and former fiscal year,
                          if changed since last report)


Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  Registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                                Yes / x / No / /










                           PARKER & PARSLEY 86-A, LTD.

                                TABLE OF CONTENTS


                                                                       Page
                          Part I. Financial Information

Item 1.    Financial Statements

           Balance Sheets as of March 31, 2001 and
              December 31, 2000.......................................    3

           Statements of Operations for the three months
             ended March 31, 2001 and 2000............................    4

           Statement of Partners' Capital for the three months
             ended March 31, 2001.....................................    5

           Statements of Cash Flows for the three months
             ended March 31, 2001 and 2000............................    6

           Notes to Financial Statements..............................    7

Item 2.    Management's Discussion and Analysis of Financial
             Condition and Results of Operations......................    7


                           Part II. Other Information

Item 6.    Exhibits and Reports on Form 8-K...........................    9

           Signatures.................................................   10



                                        2





                           PARKER & PARSLEY 86-A, LTD.
                          (A Texas Limited Partnership)

                          Part I. Financial Information

Item 1.      Financial Statements

                                 BALANCE SHEETS



                                                     March 31,      December 31,
                                                       2001            2000
                                                    -----------     -----------
                                                    (Unaudited)

                       ASSETS

                                                              
Current assets:
   Cash                                             $    47,205     $    46,169
   Accounts receivable - oil and gas sales               76,358         150,881
                                                     ----------      ----------
          Total current assets                          123,563         197,050
                                                     ----------      ----------
Oil and gas properties - at cost, based on the
   successful efforts accounting method               7,132,242       7,132,242
Accumulated depletion                                (6,728,128)     (6,721,529)
                                                     ----------      ----------
          Net oil and gas properties                    404,114         410,713
                                                     ----------      ----------
                                                    $   527,677     $   607,763
                                                     ==========      ==========
LIABILITIES AND PARTNERS' CAPITAL

Current liabilities:
   Accounts payable - affiliate                     $    14,635     $    12,398

Partners' capital:
   Managing general partner                               3,823           4,647
   Limited partners (10,131 interests)                  509,219         590,718
                                                     ----------      ----------
                                                        513,042         595,365
                                                     ----------      ----------
                                                    $   527,677     $   607,763
                                                     ==========      ==========




  The financial information included as of March 31, 2001 has been prepared by
  the managing general partner without audit by independent public accountants.

   The accompanying notes are an integral part of these financial statements.


                                        3





                           PARKER & PARSLEY 86-A, LTD.
                          (A Texas Limited Partnership)

                            STATEMENTS OF OPERATIONS
                                   (Unaudited)



                                                         Three months ended
                                                             March 31,
                                                      -------------------------
                                                         2001           2000
                                                      ----------     ----------

                                                               
Revenues:
   Oil and gas                                        $  219,518     $  196,979
   Interest                                                1,816          1,140
   Gain on disposition of assets                             -           10,237
                                                       ---------      ---------
                                                         221,334        208,356
                                                       ---------      ---------
Costs and expenses:
   Oil and gas production                                101,139         89,952
   General and administrative                              4,249          5,909
   Depletion                                               6,599          7,063
                                                       ---------      ---------
                                                         111,987        102,924
                                                       ---------      ---------
Net income                                            $  109,347     $  105,432
                                                       =========      =========
Allocation of net income:
   Managing general partner                           $    1,093     $    1,054
                                                       =========      =========
   Limited partners                                   $  108,254     $  104,378
                                                       =========      =========
Net income per limited partnership interest           $    10.69     $    10.30
                                                       =========      =========




         The financial information included herein has been prepared by
  the managing general partner without audit by independent public accountants.

   The accompanying notes are an integral part of these financial statements.


                                        4





                           PARKER & PARSLEY 86-A, LTD.
                          (A Texas Limited Partnership)

                         STATEMENT OF PARTNERS' CAPITAL
                                   (Unaudited)





                                         Managing
                                         general       Limited
                                         partner       partners        Total
                                        ---------     ----------     ----------


                                                            
Balance at January 1, 2001              $   4,647     $  590,718     $  595,365

   Distributions                           (1,917)      (189,753)      (191,670)

   Net income                               1,093        108,254        109,347
                                         --------      ---------      ---------

Balance at March 31, 2001               $   3,823     $  509,219     $  513,042
                                         ========      =========      =========




         The financial information included herein has been prepared by
  the managing general partner without audit by independent public accountants.

   The accompanying notes are an integral part of these financial statements.


                                        5





                           PARKER & PARSLEY 86-A, LTD.
                          (A Texas Limited Partnership)

                            STATEMENTS OF CASH FLOWS
                                   (Unaudited)




                                                         Three months ended
                                                              March 31,
                                                      ------------------------
                                                         2001          2000
                                                      ----------    ----------

                                                              
Cash flows from operating activities:
  Net income                                          $  109,347    $  105,432
  Adjustments to reconcile net income to net
     cash provided by operating activities:
       Depletion                                           6,599         7,063
       Gain on disposition of assets                         -         (10,237)
  Changes in assets and liabilities:
     Accounts receivable                                  74,523       (17,195)
     Accounts payable                                      2,237         2,642
                                                       ---------     ---------
        Net cash provided by operating activities        192,706        87,705
                                                       ---------     ---------
Cash flows from investing activities:
  Additions to oil and gas properties                        -            (658)
  Proceeds from disposition of assets                        -          10,237
                                                       ---------     ---------
        Net cash provided by investing activities            -           9,579
                                                       ---------     ---------
Cash flows used in financing activities:
  Cash distributions to partners                        (191,670)      (88,643)
                                                       ---------     ---------
Net increase in cash                                       1,036         8,641
Cash at beginning of period                               46,169        76,838
                                                       ---------     ---------
Cash at end of period                                 $   47,205    $   85,479
                                                       =========     =========




         The financial information included herein has been prepared by
  the managing general partner without audit by independent public accountants.

   The accompanying notes are an integral part of these financial statements.


                                        6





                           PARKER & PARSLEY 86-A, LTD.
                          (A Texas Limited Partnership)

                          NOTES TO FINANCIAL STATEMENTS
                                 March 31, 2001
                                   (Unaudited)

Note 1.     Organization and nature of operations

Parker &  Parsley  86-A,  Ltd.  (the  "Partnership")  is a  limited  partnership
organized in 1986 under the laws of the State of Texas.

The  Partnership  engages in oil and gas development and production in Texas and
is not involved in any industry segment other than oil and gas.

Note 2.     Basis of presentation

In  the  opinion  of  management,  the  unaudited  financial  statements  of the
Partnership as of March 31, 2001 include all adjustments and accruals consisting
only of normal  recurring  accrual  adjustments  which are  necessary for a fair
presentation  of the results for the interim  period.  These interim results are
not necessarily indicative of results for a full year. Certain reclassifications
may have been made to the March 31, 2000 financial  statements to conform to the
March 31, 2001 financial statement presentations.

Certain  information  and footnote  disclosures  normally  included in financial
statements prepared in accordance with generally accepted accounting  principles
have been  condensed  or  omitted  in this Form 10-Q  pursuant  to the rules and
regulations of the Securities and Exchange Commission.  The financial statements
should  be read in  conjunction  with the  financial  statements  and the  notes
thereto  contained in the  Partnership's  Report on Form 10-K for the year ended
December 31, 2000, as filed with the Securities and Exchange Commission,  a copy
of which is available upon request by writing to Rich Dealy,  Vice President and
Chief Accounting Officer,  5205 North O'Connor  Boulevard,  1400 Williams Square
West, Irving, Texas 75039-3746.

Item 2.     Management's Discussion and Analysis of Financial Condition
              and Results of Operations (1)

Results of Operations

Revenues:

The Partnership's  oil and gas revenues  increased 11% to $219,518 for the three
months ended March 31, 2001 as compared to $196,979 for the same period in 2000.
The increase in revenues resulted from higher average prices received, offset by
a decrease in  production.  For the three  months  ended March 31,  2001,  3,970
barrels of oil, 2,382 barrels of natural gas liquids  ("NGLs") and 10,876 mcf of
gas were sold, or 8,165 barrel of oil equivalents ("BOEs"). For the three months
ended March 31, 2000, 4,620 barrels of oil, 3,346 barrels of NGLs and 14,461 mcf
of gas were sold, or 10,376 BOEs.

                                        7





The average price received per barrel of oil increased  $.74, or 3%, from $27.46
for the three months ended March 31, 2000 to $28.20 for the same period in 2001.
The average  price  received per barrel of NGLs  increased  $4.94,  or 36%, from
$13.90 for the three  months  ended March 31, 2000 to $18.84 for the same period
in 2001.  The average price  received per mcf of gas  increased  253% from $1.63
during the three  months  ended  March 31,  2000 to $5.76 for the same period in
2001. The market price for oil and gas has been  extremely  volatile in the past
decade, and management expects a certain amount of volatility to continue in the
foreseeable  future.  The  Partnership may therefore sell its future oil and gas
production at average prices lower or higher than that received during the three
months ended March 31, 2001.

Gain on disposition of assets of $10,237 was recognized  during the three months
ended March 31, 2000  resulting  from  equipment  credits  received on one fully
depleted well.

Costs and Expenses:

Total costs and expenses  increased to $111,987 for the three months ended March
31, 2001 as compared  to  $102,924  for the same period in 2000,  an increase of
$9,063,  or 9%. This  increase was  primarily  due to an increase in  production
costs,  offset by decreases in general and  administrative  expenses ("G&A") and
depletion.

Production  costs were  $101,139  for the three  months ended March 31, 2001 and
$89,952 for the same period in 2000  resulting in an $11,187  increase,  or 12%.
This  increase was primarily due to  additional  well  maintenance  and workover
costs  incurred  to  stimulate  well  production  and  higher  production  taxes
associated with higher oil and gas prices.

G&A's  components are independent  accounting and engineering  fees and managing
general partner  personnel and  administrative  costs.  During this period,  G&A
decreased  28% from $5,909 for the three  months  ended March 31, 2000 to $4,249
for the same period in 2001.  The decrease is  attributable  to the  Partnership
being credited for an over allocation of $2,337 by the managing  general partner
for personnel and administrative costs for the year ended December 31, 2000.

Depletion  was $6,599 for the three  months  ended March 31, 2001 as compared to
$7,063 for the same period in 2000, a decrease of $464, or 7%. This decrease was
primarily due to a decline in oil production of 650 barrels for the period ended
March 31, 2001 as compared to the same period ended March 31, 2000.

Liquidity and Capital Resources

Net Cash Provided by Operating Activities

Net cash provided by operating  activities  increased  $105,001 during the three
months  ended March 31, 2001 from the same period in 2000.  The increase was due
to an  increase  of  $23,215 in oil and gas sales  receipts  and  reductions  of
$91,313 in working capital and $1,660 in G&A expenses,  offset by an increase in
production costs of $11,187.  The increase in oil and gas receipts resulted from
the increase in commodity  prices  during 2001 which  contributed  an additional
$80,372 to oil and gas receipts, offset by $57,157 resulting from the decline in
production  during 2001 as compared to the same period in 2000.  The increase in

                                        8





production  costs was primarily due to additional well  maintenance and workover
costs incurred to stimulate well production and an increase in production  taxes
associated with higher oil and gas prices.

Net Cash Provided by Investing Activities

The Partnership's  investing  activities during the three months ended March 31,
2000 were related to equipment upgrades on active properties.

Proceeds  from  disposition  of assets of $10,237  during the three months ended
March 31, 2000 resulted from  equipment  credits  received on one fully depleted
well.

Net Cash Used in Financing Activities

For the three months ended March 31, 2001,  cash  distributions  to the partners
were $191,670,  of which $1,917 was distributed to the managing  general partner
and $189,753 to the limited partners.  For the same period ended March 31, 2000,
cash  distributions to the partners were $88,643,  of which $886 was distributed
to the managing general partner and $87,757 to the limited partners.

Proposal to acquire partnerships

On April  17,  2001,  Pioneer  Natural  Resources  Company  ("Pioneer")  filed a
preliminary  proxy   statement/prospectus   with  the  Securities  and  Exchange
Commission  proposing an agreement  and plan of merger  among  Pioneer,  Pioneer
Natural  Resources  USA, Inc.  ("Pioneer  USA"),  a wholly- owned  subsidiary of
Pioneer,  and the limited partners of 46 Parker & Parsley limited  partnerships.
Each  partnership  that  approves the agreement and plan of merger and the other
related  merger  proposals  will  merge  with  and  into  Pioneer  USA,  and the
partnership  interests of each such partnership will be converted into the right
to receive cash and Pioneer  common  stock.  Pioneer USA is the sole or managing
general partner of the  partnerships.  The Partnership is one of the 46 Parker &
Parsley limited  partnerships  being requested to approve the agreement and plan
of merger.  The  preliminary  proxy  statement/prospectus  is non-binding and is
subject to, among other  things,  consideration  of offers from third parties to
purchase any  partnership  or its assets,  the majority  approval of the limited
partnership  interests in each  partnership and the resolution of Securities and
Exchange  Commission  review  comments.  No  solicitation  will  be  made  using
preliminary materials.

- ---------------

(1)     "Item 2. Management's Discussion and Analysis of Financial Condition and
        Results of Operations"  contains forward looking statements that involve
        risks and uncertainties.  Accordingly,  no assurances can  be given that
        the actual events and results will not be  materially different than the
        anticipated results described in the forward looking statements.

                           Part II. Other Information



Item 6.       Exhibits and Reports on Form 8-K

(a)    Exhibits - none

(b)    Reports on Form 8-K - none.


                                        9




                           PARKER & PARSLEY 86-A, LTD.
                          (A Texas Limited Partnership)



                               S I G N A T U R E S



     Pursuant to the  requirements of the  Securities Exchange Act of 1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                                             PARKER & PARSLEY 86-A, LTD.


                                   By:      Pioneer Natural Resources USA, Inc.
                                             Managing General Partner



Dated:  May 8, 2001                By:      /s/ Rich Dealy
                                            ----------------------------------
                                            Rich Dealy, Vice President
                                              and Chief Accounting Officer


                                       10