As of 2014 this trail is uphill only to bikes. Easiest access is from the Coyote Hollow trailhead near the Draper temple. From the trailhead, take a hard right onto Bonneville Shoreline. Soon you'll encounter another fork near a bridge; head left across the bridge to start climbing Clark's.
Clark's is a technically easy trail but at an average grade of ~12%, it will test your stamina and lung capacity. The trail is smooth with the occasional root or rock but nothing very challenging. Most of the trail is well shaded.
The trail ends at the Peak View trailhead where you can descend Rush
, Ann's Trail
, or Canyon Hollow
via Brock's Point. Other options include climbing the dirt Corner Canyon Road for another mile or so and descending via Ghost Falls, or climbing the jeep road Alpine Perimeter for about 1.5 miles and descending Jacob's Ladder.