Coin-op showers. $4/5min. Kinda meh on the cleanliness but super convenient.

Little water fill station right outside of Zion NP. I wouldn't fill up more than a gallon or two, but it's a great spot to top up before going into the park!

Cheap, clean showers downstairs from Zion Outfitters and within walking distance to both Watchman and South Campgrounds. Bring flip flops and come at off hours as this gets busy with everyone that hikes the Narrows or other canyons in Zion. The red dirt gets everywhere and you’ll appreciate a hot shower after a long day of hiking or climbing!!