Near Twin Sisters Peak Trail
Beginning of the trail through a gap in the log fencing.
Near Twin Sisters Peak Trail
Little rock formation along the trail.
Near Twin Sisters Peak Trail
Some late season wildflowers along the trail, looking south.
Near Twin Sisters Peak Trail
More rock formations in the distance.
Near Twin Sisters Peak Trail
Pretty section of trail through less dense pine forest.

Looking for more photos?

View All Photos
Driving Directions
Hike Trail

Twin Sisters Peak Trail

3.5 (2 Ratings)
Not really a destination trail, but a fun ramble if you're in the area (and especially if you have a twin sister)!
1.3
mi
Distance
793
ft
Gain
moderate
Difficulty
ViewsWildflowers
Access Issues
Parking is only allowed at Gross Reservoir's "North Shore Access." Parking at old trailhead and along access road (Indian Peaks Traverse - IPT - or Boulder County Road 68J) is not allowed.

Route Details

Flatter
Steeper
1.25mi
Distance
793ft
Elevation Gain
14ft
Elevation Loss
25%
Max Grade
8,731ft
High Point
7,953ft
Low Point
Path Type
Point to Point
Description
Start the trail through an open section of log fencing along County Road 68J. The beginning is not marked but it is near powerlines and directly after the road makes a sharp turn from south to west. The narrow trail is somewhat faint here and eroded. Meander up through meadows with scattered pine trees and wildflowers. The partially shaded trail goes mainly at a steady grade until it approaches some of the smaller rock formations. Steeper sections of trail ascend through a tighter valley with several annoying washed out sections and at least one downed tree across the path. Fleeting views of Gross Reservoir and the surrounding hills are available along this trail. There are a few small saddles and false "summits" before reaching a small clearing. Here in the clearing, there are paths leading in different directions. Head west to reach Twin Sisters Peak. Taking the path north will take you to Twin Sisters Road and eventually to Magnolia Road. About 1/2 way along the trail, one of the first prominent rock formations to the west is called Sisters Rock, where there is at least one rock climb: https://www.mountainproject.com/area/112818092/sisters-rock

Route Conditions

Report Conditions
Anonymous Adventurer
Some Issues
Looking for more condition reports?
View History

Nearby Hike Routes

Walker Ranch

Hike Route

Walker Ranch

River/Creek
strenuous
7.78 mi
+1,571 ft
Walker Ranch, Ethel Harrold, and Canyon Falls

Hike Route

Walker Ranch, Ethel Harrold, and Canyon Falls

Dogs Allowed
moderate
3.13 mi
+656 ft
Green Mountain West Ridge

Hike Route

Green Mountain West Ridge

Views
moderate
3.81 mi
+727 ft
Betasso Preserve

Hike Route

Betasso Preserve

Birding
moderate
7.07 mi
+898 ft
Flagstaff Summit Loop

Hike Route

Flagstaff Summit Loop

Fall Colors
moderate
2.41 mi
+500 ft
Switzerland Trail - Bald Mountain Loop

Hike Route

Switzerland Trail - Bald Mountain Loop

Fall Colors
strenuous
4.76 mi
+736 ft
Contributors
Megan W