34e303 is a hiking, biking, and horse trail in Inyo County, California. It is within Ancient Bristlecone Pine Forest and Inyo National Forest. It is 5.9 miles long and begins at 8,351 feet altitude. Traveling the entire trail is 2.7 miles with a total elevation gain of 1,180 feet. Black Canyon Spring and other springs and the Black Canyon Mine (elevation 5,876 feet) quarry can be seen along the trail.