Neff's Canyon Trail is a 3.5 mile hike or backcountry ski trail. It begins as an old jeep road and then leads into the Mount Olympus Wilderness Area. The canyon is larger than it may seem and has many smaller drainages. The hiking opportunities are varied, with access to the Desolation Trail in Thayne Canyon. Neff's Cave, claimed to be one of the deepest caves in the United States, is also accessible by this trail. However, the cave has been closed due to natural hazards and spelunking difficulties. Written permission is necessary to gain access.

Dogs are allowed in Mill Creek Canyon but must be kept on a leash at all trail heads and developed sites including the parking areas.

Directions: From Salt Lake City, Head east toward Mill Creek Canyon on 3800 South Wasatch Blvd. At the first stop sign (Parkview Dr., 3700 East) turn right and go 1.1 miles to Parkview Terrace (4175 East 4245 South). Turn left and continue to White Way (4275 South 4260 East), turn right heading generally eastward and uphill to the end of the road. The trailhead is marked and the trail begins as a rocky jeep road. The drive takes you through a residential area. Please be courteous of others and their property. No parking after 10:00 PM.

Elevation: 3,600 feet

Ending Elevation: 9,200 feet

Elevation Gain: 3,600 feet

Distance: 3.5 miles

Usage: Moderate

Difficulty: Strenuous

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