Sulphur Creek is a 5.8-mile, one-way canyon hike from the paved UT-24 pullout to the visitor-center area. The route starts in a dry wash, drops into Sulphur Creek, then follows water through narrows and three waterfall obstacles before coming out near Fruita. It’s a hard, hands-on crossing, and it is not an official maintained trail. Allow about four to five hours for the canyon route, then add any return to your vehicle.
Set up a vehicle at each end before you start. The park does not provide a shuttle; walking back to the upper pullout adds 3.3 miles along UT-24. If that commitment or the scrambles don’t suit you, a separate short walk from the visitor-center end reaches a small waterfall in about 0.7 mile each way. That out-and-back is not the full Sulphur Creek route.