Canyoneering in the vast Grand Staircase-Escalante National Monuments of southern Utah.

This long hike into the backcountry consists almost exclusively of wading though 1-3 inches of warm water and a very fine-grained but firm sandy bottom. Colour changes from solid orange-red to dark red / white banding about 2/3rds of the way up.
The hot water first made me think its a hot spring, since it was about 80-90 degrees - but it had run down in shallow films over hot, dark and very shallow rocks - so after 2-3 hours of sunlight its really, really warm.
Multiple places with quicksand, but no venomous snakes from what I saw, although sidewinders have been seen by others.
I won't say where this is exactly, the whole of rural southern utah has stuff just like this all over the place - 4,000 square miles to explore. As much of it is very remote with no human impact, if some piece of it suddenly becomes quite popular on social media, there often occurs surge in hikers, instagramers, their food waste and poop, catching fish and lizards, and killing snakes etc.
This happened to part of the Trinity Alps in North California with a 'wildflower craze' in 2020, and happens regularly to lakes in the North Cascade National Park, and several remote caves / mines that had to be closed off to all exploreres following instagram-related fatal misadventure.
So now, road ramblers have a cultural rule NOT to divulge specific details. People sufficiently interested should then contact the local rangers who are always happy to help, day/nite, to give locations and advice etc.