Start at Big Spring Canyon Overlook, at the end of the paved Needles Scenic Drive. The trail drops into Big Spring Canyon, then climbs out through the Keyhole, a shaded opening between sandstone towers. Farther on, it crosses open slickrock, washes, and a string of canyon dips. A steel ladder helps with one steep rock shelf; other ledges call for careful footing and some hand scrambling. Follow the cairns when the worn path fades.
The listed elevation change is only 309 feet, but that hides the repeated drops and climbs. The cumulative climbing is much greater, and the route stays exposed for long stretches.