1 EXHIBIT 21.1 Boyd Gaming Corporation Significant Subsidiaries: California Hotel and Casino (State of Incorporation or Organization) Nevada (IRS Employer Identification Number) 88-012743 Boyd Tunica, Inc. (State of Incorporation or Organization) Mississippi (IRS Employer Identification Number) 64-0829658 Boyd Mississippi, Inc. (State of Incorporation or Organization) Mississippi (IRS Employer Identification Number) 93-1104426 Boyd Kansas City, Inc. (State of Incorporation or Organization) Missouri (IRS Employer Identification Number) 43-1649728 Boyd Kenner, Inc. (State of Incorporation or Organization) Louisiana (IRS Employer Identification Number) 88-0319489 Mare-Bear, Inc. (State of Incorporation or Organization) Nevada (IRS Employer Identification Number) 88-0203692 Sam-Will, Inc. (State of Incorporation or Organization) Nevada (IRS Employer Identification Number) 88-0203673 Eldorado, Inc. (State of Incorporation or Organization) Nevada (IRS Employer Identification Number) 88-0093922 MSW, Inc. (State of Incorporation or Organization) Nevada (IRS Employer Identification Number) 88-0310765 Par-A-Dice Gaming Corporation (State of Incorporation or Organization) Illinois (IRS Employer Identification Number) 37-1268902 East Peoria Hotel, Inc. (State of Incorporation or Organization) Illinois (IRS Employer Identification Number) 37-1342276 Boyd Travel, Inc. (State of Incorporation or Organization) Nevada (IRS Employer Identification Number) 88-0345135 II-10