From The Grand Junction Daily Press (Dave Buchanan):
To prevent the spread of aquatic nuisance species, all trailered vessels entering and leaving the park are required to be inspected. The inspection station is open from 8 a.m. through 4:30 p.m. seven days a week through May 3. After then to May 15, hours will be 8 a.m. until 6 p.m. After May 15, the summer inspection hours will go into effect: 7 a.m. to 8 p.m. Sunday through Thursday and 7 a.m. to 10 p.m. on Fridays and Saturdays through Labor Day.
More Uncompahgre River watershed coverage here.