Based on the latest information available, UT 21 Beaver County boat ramp is located at latitude 38.21878815 and longitude -112.83042908 in Utah. It is a concrete boat ramp that provides access to Lower Beaver Reservoir, which is a popular fishing destination for anglers in the area.

The boat ramp is approximately 12 feet wide, which is wide enough to accommodate most small to medium-sized watercraft. However, it may not be suitable for larger boats or vessels that require a wider ramp.

Lower Beaver Reservoir is a relatively small body of water that covers approximately 60 acres. It is primarily used for fishing, with common species including rainbow trout, brown trout, and brook trout. Motorized boats are allowed on the reservoir, but they must be powered by electric motors only.

Overall, UT 21 Beaver County boat ramp is a convenient access point for anglers and boaters looking to explore Lower Beaver Reservoir in Utah.