Little Brush Creek Cave
From Mojave Underground USA Wiki
Located high in the Uintah Mountains, Little Brush Creek Cave is a popular destination for cavers. It can be accessed year round, but entrance into the cave in not feasible from the first spring melt to the end of summer, as the entire Little Brush Creek, along with thousands of acres of snowmelt, flows into the cave. The cave sees an average of 250 visitors per year, January being the most popular time to visit. It is the longest cave in Utah at 5.93 miles and 658 feet deep. It is the 37th deepest cave in the US.
The cave is part of a larger caving system, and is similar to its brother, Big Brush Creek Cave. Ice crystal formation up to a foot long, and ice structures over 10' long, make this cave an amazing winter wonderland. Inside the cave, passage ways are narrow and cold. Many tunnels are plugged with logs and debris forced into it in past floods. Much of the cave is spent crawling and winding over very tight passages.
Knee and elbow pads
Headlamps with spare bulbs/batteries
Food and water
Small backpack to carry gear
Low profile helmet
40.709336° -109.500593° @ 8100'
Head north on 191 out of Vernal, UT. Go past all switchbacks and past the end of the mine property. Continue past the Red Cloud Loop turnoff. You'll go down a hill, look for a short road on the left that has a dirt parking lot. Drive or hike west and you will come see the cave to the left about 1/4 mile in.