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Routes
Hiking trails & Routes
United States
Colorado
Boulder County

Twin Sisters Peak via Forsythe Canyon

Easy

3.2

(18)

79

hikers

Twin Sisters Peak via Forsythe Canyon

01:38

5.27km

300m

Hiking

Hike the easy 3.3-mile Twin Sisters Peak via Forsythe Canyon trail for rewarding summit views of the Front Range and Boulder peaks.

Last updated: February 26, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Waypoints

A

Start point

Parking

Get Directions

1

770 m

Forsythe Canyon Trailhead

Highlight • Trail

The parking lot is packed gravel with an informational signboard and restrooms. From here you can follow the gravel road south or run into Forsythe Canyon along packed singletrack.

Tip by

2

5.24 km

Twin Sisters Peak

Highlight • Summit

B

5.27 km

End point

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Way Types & Surfaces

Way Types

2.03 km

1.90 km

1.27 km

< 100 m

Surfaces

4.91 km

349 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (2,620 m)

Lowest point (2,330 m)

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Weather

Powered by Foreca

Today

Thursday 7 May

11°C

-1°C

15 %

Additional weather tips

Max wind speed: 23.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Where does the Twin Sisters Peak via Forsythe Canyon trail start, and what are the parking options?

The trail can be accessed from the intersection of CR 68J and CR 359, or from Gross Reservoir parking by following Lakeshore Drive/Co Rd 68J. The primary starting point is the Forsythe Canyon Trailhead.

Is the Twin Sisters Peak via Forsythe Canyon trail dog-friendly?

The trail is generally dog-friendly, but always check local regulations for the Roosevelt National Forest regarding leash requirements and waste disposal to ensure a pleasant experience for everyone.

What is the best time of year to hike this trail?

The trail is enjoyable throughout much of the year. Spring and fall offer pleasant temperatures and beautiful scenery, including wildflowers. Summer is also popular, but be prepared for potential afternoon thunderstorms. Winter hiking is possible, but expect snow and ice, which can add to the challenge.

Are there any permits or fees required to hike in Roosevelt National Forest?

The trail is managed by the U.S. Forest Service. A USFS permit may be required for parking at certain access points. It's always best to check the latest regulations with the Roosevelt National Forest before your visit.

What is the terrain like on the Twin Sisters Peak via Forsythe Canyon trail?

The trail features varied terrain, meandering through meadows with scattered pine trees and wildflowers. It has partially shaded sections and generally steady grades, though some parts ascend steeply through tighter valleys. Hikers may encounter eroded sections, small loose rocks, narrow pathways, and occasionally washed-out areas or downed trees.

What are the notable features and viewpoints along the route?

The trail offers fleeting views of Gross Reservoir and the surrounding hills. The main highlight is the Twin Sisters Peak summit, which provides unobstructed views of the Front Range to the west and popular peaks near Boulder to the east.

Does the trail intersect with other paths?

Yes, the route also passes through sections of the Twin Sisters Peak Trail, Forsythe Spurs Road, and Winiger Ridge Road.

Is this trail suitable for families with children?

While generally considered moderate, some sections are steeper, and the presence of eroded paths and obstacles like downed trees can add to the challenge. Families with older children or those accustomed to hiking may find it suitable, but it might be challenging for very young children or those new to hiking.

How does this Twin Sisters Peak trail compare to the one in Rocky Mountain National Park?

This Twin Sisters Peak trail via Forsythe Canyon is a distinct, shorter, and less strenuous hike compared to its more famous namesake near Lily Lake in Rocky Mountain National Park. This route offers a more serene experience with fewer visitors, making it an appealing option for those seeking solitude without the greater elevation gain and scrambling required on the RMNP trail.

What kind of wildlife might I encounter on the trail?

As the trail is located in Roosevelt National Forest, you might encounter various wildlife common to the Front Range, including deer, elk, and a variety of bird species. Keep an eye out and maintain a respectful distance.

What should I bring for a hike on this trail?

Given the varied terrain and potential for steep sections, sturdy hiking shoes are recommended. Bring plenty of water, snacks, sun protection, and layers of clothing as weather can change quickly. A map or GPS device is also advisable.

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