Poison Ridge  
Maps/GPS:                    
USGS 7.5' Map: Hyannis Peak, Parkview Mountain
Statistics:
Difficulty: Number: Miles: Altitude: Obstacles: Time:
Easy 2 FR 107 4.30 10,630 ft. NA 1-2 hours
County: Jackson, Grand
Adopted by:      
Managed by: Routt National Forest,
Parks Ranger District		 100 N. Main (P.O. Box 158)
Walden, Colorado 80480		 (970)723-2700
Summary: Poison Ridge is a spur road off of Haystck Mountain road that drops down to follow Sheep Creek below Sheep Mountain. The road ends just before reaching Troublesome Creek.
Attractions: Scenery
Seasonal
Closure:		 Natural - Closed by heavy snows
Best Time: June - Possible snow drifts higher up
July - Best
August - Best
September - Best
October - Early snows possible
Trail Heads
Accessed:		 Poison Ridge Trail - Hiking
Camping: There is one dispersed campsite at the end of the road near Troublesome Creek.
Base Camp: This would be a good area to base camp and explore the roads and motorcycle trails around Haystack Mountain.
Fall Colors: Poor - Mostly pine forest
Navigation: From Walden, CO. head south on Main Street toward Van Horn Ave for 0.2 miles. Turn right onto Colorado Hwy 125 South Main Street and continue to follow Colorado Hwy 125 South for 26.9 miles. Slight right onto Co Rd 50/Forest Service Rd 106 and go 10.0 miles. Sharp right onto FR730 and go 1.4 miles. Left turn on to FR107, Poison Ridge road.

From Granby, CO head west on US-40 W/E Agate Ave toward South 1st Street. Continue to follow US-40 West for 3.0 miles. Turn right onto CO-125 North and go 26.4 miles. Sharp left onto Forest Service Road 106 and go 10.0 miles. Sharp right onto FR730 and go 1.4 miles. Left turn on to FR107, Poison Ridge road.
History:  
Description:
From the Haystack Mountain, FR730, Poison Ridge road heads up through a switchback to an open ridge below Sheep Mountain. The road is a two track that is a bit maintained.
Poison Ridge with Sheep Mountain in the background

photo by:
Adam M

At this ridge the Poison Ridge Hiking Trail crosses the road continuing to the northwest. There is a spur road to the southeast that stops at a parking spot and a hiking trail heads to the top of Sheep Mountain.
Looking north

photo by:
Adam M

From the ridge the road heads down to Sheep Creek. This section I have not driven but I used Google Earth to describe the rest of the route.

The road will head through thick pine forest making three sharp switchbacks as it descends down to cross Sheep Creek. After crossing the creek the road heads down the valley following Sheep Creek, though the road is above the creek. The forest a bit thinner as the road heads down the valley. It will take a short detour up a side gulch and then return to continue down the valley. You will pass a spur road on the left that goes to a dispersed campsite or hunting camp. From here the road will only travel a short distance before ending above the intersection of Sheep Creek and Troublesome Creek.
Data updated: January 4, 2026      4WD Road driven: July 27, 2025      Copyright 4X4Explore.com - 2000-2026