Three Mile Canyon, FR 228, runs 10 miles through the Sacramento Mountains. It is a straight-through trail that connects US Highway 82 with Carr Gap Canyon, FR607.
Most of the southern portion is in a wooded forest, while the northeastern end is rolling hills and valleys. Three Mile Canyon is an ungraded dirt road that may have deep mud holes and ruts with no bypass after significant rain or snow. Cattle freely roam throughout the area with multiple unlocked gates.
There are several spur trails and roads to explore and plentiful dispersed campsites.