| Form N-CSR Cover | 6 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Clark Fork Trust |
| Entity Central Index Key | 0001506980 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Nov. 30, 2024 USD ($) Holdings | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Clark Fork Trust |
| Entity Central Index Key | 0001506980 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Tarkio Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | TARKIO FUND |
| Class Name | Tarkio Fund |
| Trading Symbol | TARKX |
| Annual or Semi-Annual Statement [Text Block] | ADDITIONAL INFORMATION This semi-annual shareholder report Tarkio Fund |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://tarkiofund.com 1-866-738-3629 |
| Additional Information Phone Number | 1-866-738-3629 |
| Additional Information Website | https://tarkiofund.com |
| Expenses [Text Block] | What were the Fund costs for the past six months? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment * Tarkio Fund $63 1.00% *Annualized |
| Expenses Paid, Amount | $ 63 |
| Expense Ratio, Percent | 1% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not a good predictor of future performance |
| Line Graph [Table Text Block] | Tarkio S&P 500 11/30/14 10,000 10,000 05/31/15 10,627 10,297 11/30/15 9,629 10,275 05/31/16 10,158 10,473 11/30/16 11,971 11,102 05/31/17 13,416 12,301 11/30/17 15,457 13,640 05/31/18 14,785 14,069 11/30/2018 14,064 14,495 5/31/2019 13,401 14,601 11/30/2019 15,374 16,829 5/31/2020 12,910 16,475 11/30/2020 18,276 19,767 5/31/2021 24,878 23,115 11/30/2021 23,791 25,281 5/31/2022 20,662 23,042 11/30/2022 17,803 22,950 5/31/2023 18,673 23,715 11/30/2023 19,584 26,127 5/31/2024 23,355 30,399 11/30/2024 29,597 34,981 |
| Average Annual Return [Table Text Block] | Performance graph AVERAGE ANNUAL RETURNS 1 Year 5 Years 10 Years Tarkio Fund 51.13% 14.00% 11.46% S&P 500 ® 33.89% 11.43% 13.33% |
| Net Assets | $ 191,086,022 |
| Holdings Count | Holdings | 37 |
| Investment Company, Portfolio Turnover | 9.68% |
| Additional Fund Statistics [Text Block] | Fund statistics NET ASSETS: PORTFOLIO HOLDINGS: PORTFOLIO TURNOVER: $191,086,022 37 9.68% |
| Holdings [Text Block] | Basic Materials 1.10% Communication Services 15.85% Consumer Cyclical 7.37% Consumer Defensive 1.22% Financial Services 3.92% Healthcare 6.26% Industrials 39.54% Money Market Fund 0.34% Real Estate 1.71% Technology 17.98% Utilities 4.71% |
| Largest Holdings [Text Block] | top ten holdings (% of net Assets) 1. Lumen Technologies, Inc. 15.85% 2. General Electric Co. 10.85% 3. Cognex Corp. 9.43% 4. Manitowoc Company, Inc. 7.32% 5. Danaher Corp. 4.92% 6. ESAB Corp. 4.85% 7. GE Vernova, LLC 4.71% 8. MillerKnoll, Inc. 3.72% 9. ATS Corp. 3.64% 10. Modine Manufacturing Co. 3.47% Total % of Net Assets 68.76% |
| Updated Prospectus Phone Number | 1-866-738-3629 |
| Updated Prospectus Web Address | https://tarkiofund.com |
| Shareholder Report, Line Graph (Details) - USD ($) | Nov. 30, 2024 | May 31, 2024 | Nov. 30, 2023 | May 31, 2023 | Nov. 30, 2022 | May 31, 2022 | Nov. 30, 2021 | May 31, 2021 | Nov. 30, 2020 | May 31, 2020 | Nov. 30, 2019 | May 31, 2019 | Nov. 30, 2018 | May 31, 2018 | Nov. 30, 2017 | May 31, 2017 | Nov. 30, 2016 | May 31, 2016 | Nov. 30, 2015 | May 31, 2015 | Nov. 30, 2014 |
| Tarkio Fund | |||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||
| Account Value | $ 29,597 | $ 23,355 | $ 19,584 | $ 18,673 | $ 17,803 | $ 20,662 | $ 23,791 | $ 24,878 | $ 18,276 | $ 12,910 | $ 15,374 | $ 13,401 | $ 14,064 | $ 14,785 | $ 15,457 | $ 13,416 | $ 11,971 | $ 10,158 | $ 9,629 | $ 10,627 | $ 10,000 |
| S&P 500 Index | |||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||
| Account Value | $ 34,981 | $ 30,399 | $ 26,127 | $ 23,715 | $ 22,950 | $ 23,042 | $ 25,281 | $ 23,115 | $ 19,767 | $ 16,475 | $ 16,829 | $ 14,601 | $ 14,495 | $ 14,069 | $ 13,640 | $ 12,301 | $ 11,102 | $ 10,473 | $ 10,275 | $ 10,297 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2024 | |
| Tarkio Fund | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 51.13% | 14% | 11.46% |
| S&P 500 Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 33.89% | 11.43% | 13.33% |
| Shareholder Report, Holdings (Details) - Tarkio Fund | Nov. 30, 2024 |
| Lumen Technologies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.85% |
| General Electric [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.85% |
| Cognex Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.43% |
| Manitowoc Company [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.32% |
| Danaher Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.92% |
| Esab Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.85% |
| Ge Vernova Llc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.71% |
| Miller Knoll Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.72% |
| Ats Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.64% |
| Modine Manufacturing [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.47% |
| Basic Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| Communication Svcs [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.85% |
| Consumer Cyclical [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.37% |
| Consumer Defensive [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.22% |
| Financial Svcs [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.92% |
| Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.26% |
| Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 39.54% |
| Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.34% |
| Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.71% |
| Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.98% |
| Utilities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.71% |
