There is no entrance fee at Wolf Trap. If you plan to visit other parks with an entrance fee, learn more about the America the Beautiful - The National Parks and Federal Recreational Lands Pass series and fee-free entrance days in National Parks.
Annual "Every Kid in a Park" 4th Grade Pass - Free
Available to U.S. 4th graders (including home-schooled and free-choice learners 10 years of age) with a valid "Every Kid in a Park" paper voucher. The pass is valid for the duration of the 4th grade school year through the following summer (September through August). Paper vouchers can be obtained by visiting the Every Kid in a Park website and those vouchers may be exchanged for the Annual 4th Grade Pass at federal recreation sites that charge entrance fees or amenity fees.