Although no biking is allowed in the Kachina Peaks Wilderness, a network of US Forest Service roads near this campground are fair game. You can also find a lift-assisted downhill MTB track back through town at Snowball.
The Inner Basin Trail starts near Lockett Meadow and leads to the crater at the base of the towering San Francisco Peaks, an area protected by the Kachina Peaks Wilderness. This trail eventually crosses the Doyle Saddle Trail, which climbs up the rim of the volcano and allows you to summit Humphreys Peak, the highest point in Arizona at 12,637 feet. Hiking off-trail above 11,400 feet is not allowed in this delicate wilderness.
Multiple trad, sport, and boulder climbing sites sit within an hour of Lockett Meadow, including Hobo Jungle, Ghost Town, and the Freidlein Prairie boulders. Climbing stores in Flagstaff can provide gear and beta.
Lockett Meadow is home to elk, porcupines, and black bears, among other critters.