This is a mostly flat trail with very little elevation change. Follow the dirt path through some brush and down to the creek bed. The Willis Creek Slot Canyon trail starts across the road from the parking lot. You can also call the Visitor Center at 43 for more information. It’s also not safe to hike in slot canyons if there is the potential for a flash flood. When the sand on this road gets wet, it turns into a muddy mess you do not want to deal with. If it has rained the day before your visit or will rain, save this for another day. Make sure to check road conditions at the Visitor Center in Cannonville. It is a lot of washboard gravel road with some large potholes here and there. I saw everything from small cars, RVs, camper vans, and trucks on this road. The dirt road to the trail is rough but typically doable with a 2WD vehicle. We took around 2 hours to hike the 2.8 miles to the end of the slot canyon portion and back.
This will depend on how far you hike down the trail.