Boulder Mountain, also known as Utah’s Aquarius plateau, is part of the High Plateaus section of the Colorado Plateau. Ranging over 11,000 feet in elevation, Boulder Mountain is roughly 90 miles long, north to south, and forms what looks like an S in reverse. The plateau covers more than 900 square miles, and is the largest and highest plateau in Bryce Canyon Country. Eighty lakes are found across the mountain that is covered in aspen, fir, spruce , sub-alpine grasslands and meadows. Along the middle elevations you'll find ponderosa pine, while pinyon and juniper trees are found in the lower elevations.
On the east side of Boulder Mountain you'll find the communities of Escalante and Boulder which lie along Scenic Byway 12. On the east side of Boulder Mountain is Antimony, Utah. To the southwest is Bryce Canyon City and Bryce Canyon National Park. From the northern end of Boulder Mountain you can see down on communities such as Torrey, Bicknell, and Teasdale, and you can see Thousand Lakes mountain. The Aquarius Plateau is said to be the highest timbered plateau in North America. The highest point is Bluebell Knoll 11,328 feet. on
Some scientists indicate that the Aquarius Plateau was formed around 20 million years ago. Much of the Aquarius Plateau is managed by the U.S. Forest Service. The Aquarius Plateau rises high above Grand Staircase Escalante National Monument which can be seen to the east of Boulder Mountain. On the northeast of Boulder Mountain you'll find overlooks toward Capitol Reef National Park
Recreation areas and points of interest on or around Boulder Mountain include Box Death Hollow Wilderness Area, Hells Backbone, Powell Point, and Pine Lake.
Several dirt mountain roads provide access to much of Boulder Mountain and offer access to the lakes for fishing, and to scenic areas for camping, hunting, hiking, mountain biking, and ATV riding.