located in Columbia, Timonium and Rockville, MD. We pride ourselves on offering the best rock climbing in the greater Washington DC, Northern Virginia and Maryland region. Each climbing...Earth Treks Climbing Center - Rock Climbing Gym Earth Treks is a very special community of climbers. Earth Treks' Climbing Centers are state-of-the-art indoor climbing gyms... Treks' rock climbing and ice climbing guide service, founded in 1990, is the oldest and largest in the region. Our international mountaineering guide service has lead over 150...