Twin Sisters Peaks, Mountain summit in Rocky Mountain National Park, Colorado, US
Twin Sisters Peaks is a two-summit mountain formation in the Front Range of Colorado, with the two tops linked by a rocky, boulder-covered saddle. The formation sits on the eastern edge of Rocky Mountain National Park and rises clearly above the surrounding forest.
The peaks were once known by the names Lillie Mountain and Tahosa Mountain and were used as hunting grounds by Indigenous peoples long before European settlement. They became part of the Rocky Mountain National Park area when the park was established in 1915.
The peaks are a common starting point for people who want to gain confidence on mountain terrain before moving on to more demanding routes in the region. On weekends, the trail sees a steady flow of hikers of all levels, from families to more experienced climbers.
The trail to the summits takes around 4 hours round trip and crosses open, exposed sections where weather can shift quickly, especially in the afternoon. Starting early in the morning gives hikers the best chance of reaching the tops before storm conditions develop.
Although the two summits are close together, the view from each one differs noticeably, since they face slightly different directions over the valleys below. The eastern summit, which is actually the lower of the two, offers a more open look toward the plains stretching east from the mountains.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
