3n43 is a hiking, biking, and horse trail in San Bernardino County, California. It is within San Bernardino National Forest. It is 1.3 miles long and begins at 7,394 feet altitude. Traveling the entire trail is 2.6 miles with a total elevation gain of 223 feet. The Wilbur Grave (elevation 7,385 feet) attraction and the Harvey K Mine (elevation 7,520 feet) quarry can be seen along the trail.