The Twin Sisters ridge runs nearly two miles along the east central boundary of Rocky Mountain National Park. From the summit there are panoramic views of the eastern plains, Rocky Mountain National Park, and Longs Peak.
- Trailhead: Twin Sisters
- Round trip: 7 miles / 11.3 km
- Elevation: 9,060′-11,428′ (+2,368) / 2,761m – 3,483m (+722m)
The trail climbs through endless switchbacks in a lodgepole pine forest before opening onto a boulder field above timberline. A significant portion of the trail passes through Rocky Mountain National Park. Near the summit there is a radio tower and stone building, a weather vane, and solar cell panels. From there, reaching the summit requires an additional rock scramble up a short trail. From the summit there are panoramic views of the eastern plains, Rocky Mountain National Park, and Longs Peak. Twin Sisters trailhead is located on national park land.
Massive rock-slide area along trail in September of 2013.
Twin Sisters trek