Unlike many of the canyons of The Kaiparowits Plateau, Tommy Canyon has a small year-round stream. The canyon walls are host to numerous overhangs and small caves. Large alcoves, side canyons, cottonwood trees, and desert springs adorned with hanging gardens make this an interesting hike.
Tommy Canyon begins as a broad wash with almost nonexistent canyon walls. Downstream, the cliff walls gradually rise and the canyon narrows. The yearlong flow of water in the canyon leads to areas of thick vegetation. Cottonwood trees, willows, and tamarisks fill the wash while pinyon pine and juniper trees grow along the benches and cliff terraces.