The Doorway Rocks - Minor Mass is located near the top of the Potholes trail to the west of Red Rocks. The formation contains a good range of climbs with good exposure and length. The formation includes an 80 foot tower (South Tower) and two distinct levels, offering good opportunity to practice multi-pitch leads. The Minor Mass is rarely crowded, in part because it is less easily accessed than other popular areas. Don't let the lack of crowds fool you. The quality of the climbs on this formation is equal to those found at the East Rampart or other popular spots.

To access the Doorway Rocks - Minor Mass park at the South Shore parking area and take the paved path north across the railroad tracks. At the junction of the Balanced Rock Trail and the Grottos Trail turn right and take the Grottos Trail. Walk along the base of the talus slope for about ten minutes until you see the Potholes Trail heading left up the bluff. Take the Potholes Trail up the bluff and go through the Red Rocks formation. Looking left you will see the Doorway Rocks - Minor Mass formation (it is nearer to the Potholes Trail and sits slightly higher up than the Doorway Rocks - Major Mass). About 50 yards above the Red Rocks formation cut across the slope for about 100 feet until you reach the cliff of the Minor Mass. If you can locate the South Tower (the lowest reaching portion of the formation) you can use it to find your bearings.