Use sunset as your turnaround alarm.
The geology here is unusually easy to read. Hard Dakota sandstone boulders sit on top of softer Entrada pedestals, and the caprock shields the column beneath it from rain and wind while everything around erodes away, which is how you get the mushroom shape. The route starts at a cattle gate on the north side of Highway 89 and follows a sandy wash north, climbing out once around the 0.4 mile mark to get past a small pouroff. There is essentially no shade and the slope faces south.
Mushroom rocks 20 minutes off the highway.
Heat note: desert country - in summer start at dawn and carry more water than feels reasonable.
Water bottle, sunscreen, hat, snacks, comfortable shoes.
Make it a weekend: Sunset Campground (Bryce) (Camping, 40 mi) · North Campground (Bryce) (Camping, 41 mi) · Wide Hollow Reservoir (Fishing, 49 mi) · Sevier River (Upper) (Fishing, 52 mi)
More hikes nearby: Buckskin Gulch (Wire Pass) (Hike, 10 mi) · Angel's Palace (Hike, 29 mi) · Kanab Sand Caves (Hike, 36 mi) · Peekaboo Loop (Hike, 39 mi)