Use sunset as your turnaround alarm.
This hike requires a permit or fee. Check current rules before you go: recreation.gov or the managing agency.
This one is unusual because the permit is not federal. Iron County and the City of Kanarraville run the access, the daily count is capped, and you book through the town's own system rather than recreation.gov. The hike starts from a city-maintained lot in Kanarraville, reached from I-15 exit 51 and about 13 miles of Old Highway 91, and the route goes up the creek itself rather than alongside it. Expect wet feet from the first crossing on, and shoes that drain.
Slot canyon + ladders + waterfalls. Fee/permit capped daily - book ahead.
Heat note: desert country - in summer start at dawn and carry more water than feels reasonable.
2 liters water, trail shoes, sun layer, snacks, small first-aid kit.
Make it a weekend: Kolob Reservoir (Fishing, 10 mi) · Skyline Pond (Cedar City area) (Fishing, 12 mi) · Lava Point Campground (Camping, 13 mi) · Point Supreme Campground (Cedar Breaks) (Camping, 20 mi)
More hikes nearby: Spectra Point / Ramparts (Hike, 19 mi) · Riverside Walk (Hike, 21 mi) · The Narrows (Bottom-Up) (Hike, 22 mi) · Angels Landing (Hike, 22 mi)