Monument Trail, Arroyo Seco Trail and West Mesa Trail Loop

The Monument Trail, Arroyo Seco Trail and West Mesa Trail Loop is a 10.2 km looped trail that starts and ends in Descanso, San Diego County, California. Based on our data, the hike is graded as Medium. For information on how we grade trails, please read measuring the difficulty of a hiking trail on hiiker. Also, check our latest community posts for trail updates. This hike can be completed in approx 2 hrs 42 mins. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.