Forsythe Canyon Trail


Forsythe Canyon Trail is a non-motorized hiking trail near Gross Reservoir. From the Forsythe Canyon Trailhead, walk downhill from the parking area. The trail begins near the gate on National Forest System Road 359.

Forsythe Canyon Trail leads off of a rocky point, following Forsythe Creek down its wooded, rocky canyon. The small creek runs noisily in spring, forming small, picturesque waterfalls and cascades finally ending at the far northwestern tip of Gross Reservoir.

Camping in this area is restricted to the designated campsites along National Forest System Road 359.

Gross Reservoir is managed by Denver Water. Please visit their website for regulations and additional information.

At a Glance

Current Conditions: Camping allowed at designated campsites along National Forest System Road 359. This road is typically open to motorized vehicles between May and October.
Usage: Light
Restrictions: Motorized and mechanized vehicles are prohibited. Fishing and hunting are allowed in accordance with regulations established by the Colorado Parks & Wildlife.
Closest Towns: Boulder, Colorado
Water: Lakes and streams; treat water for drinking.
Restroom: Practice Leave No Trace principles
Operated By: U.S. Forest Service
Information Center: Boulder Ranger District, 2140 Yarmouth Ave, Boulder, CO 80301, Phone 303-541-2500, Fax 303-541-2515; Contact Us

General Information


From Boulder, head west on Canyon Boulevard, (Colorado Highway 119) for four miles and turn southwest onto Magnolia Road (County Road 132). Continue on Magnolia Road for 6.6 miles and turn southeast onto County Road 68. Follow CR 68 for two miles and turn southeast onto National Forest System Road 359.

Recreation Map

Map showing recreational areas. Map Information



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Mountain Biking

Forsythe Canyon Trail is a short segment of singletrack trail west of Gross Reservoir. Other four-wheel drive roads in the area provide additional mileage of riding.
Difficulty Level: Easy to Intermediate


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Horse Riding & Camping

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Areas & Activities

Campgrounds At-A-Glance


  Area/Length : 
Forsythe Canyon Trailhead to Gross Reservoir: 1 mile. (one way)

  Latitude : 

  Longitude : 

  Elevation : 
7,280' - 7,680'