Greyrock Mountain Loop
ElevationAscent: 2,241' 683 m
Descent: -2,241' -683 m
High: 7,469' 2,277 m
Low: 5,571' 1,698 m
GradeAvg Grade: 11% (7°)
Max Grade: 34% (19°)
Current trail conditions
Popular runs nearby
Horsetooth Falls Out and Back
2.3 mi 3.7 km • Out and Back • 378 ft Ascent 115.29 m Ascent
Singletrack Laporte, CO( 15 )
Blue Sky Trail Marathon
27.5 mi 44.2 km • Loop • 3,454 ft Ascent 1052.66 m Ascent
Singletrack Laporte, CO( 2 )
Beaver Creek Hourglass Loop
20.0 mi 32.2 km • Point to Point • 3,612 ft Ascent 1100.87 m Ascent
Singletrack Red Feather Lakes, CO( 1 )
Mahogany to Towhee Loop
5.4 mi 8.6 km • Loop • 443 ft Ascent 134.92 m Ascent
Singletrack Wellington, CO( 1 )
Crystal Lakes Long Loop
32.0 mi 51.5 km • Point to Point • 5,919 ft Ascent 1804.08 m Ascent
Singletrack Estes Park, CO( 1 )
Run this trail?
Add details to help others plan their adventure.
“This great run rewards you with amazing views!”— Steven W
Once at the top of the run you get a great view of the surrounding area looking down into Fort Collins and up into the canyon. You can also see the Mummy Range in the northern part of RMNP. Generally, the only drawback for most people is the elevation gain; climbing almost 2,000 feet in 3.1 miles is quite the climb in often dry conditions. Planning to do this run in the morning or a summer evening (bring a headlamp) can be best so you miss the hotter parts of the afternoon.
This isn't the best choice for a first-time runner – there are many places to take wrong turns. However, there are often lots of folks on a summer weekend!
This trail is best in the spring and early summer as there is plenty of water flowing in the river (at the start of the trail) and you'll find beautiful ponds at the top of Greyrock.
Note that there are two trails for the middle section - the "Meadows" and a more direct Greyrock Trail #946. #946 gets steeper in sections while still maintaining a relatively clear trail.
I recommend you take the Greyrock Trail #946 up (take the right at the first junction). Once arriving at the upper junction with Greyrock's summit in front of you, stay to the right to climb it.
Once past the upper junction, there's a short dirt section before climbing a ramp of rock on the southeast side of the actual Greyrock. After leaving the trail, look for the wooden trail posts sporadically placed. There are some easy and solid rocks to scramble as you come up the eastern end. Once into the saddle where folks often camp, look for the rock cairns that will lead you to the top. It's easy to get lost here. If you're scrambling/climbing anything crazy, you're off the direct trail.
After climbing up Greyrock, you'll come back down to this same upper junction, but this time, follow the sign leading you to the Greyrock Meadows Trail #947 for the way down. This is a nice gradual decline that takes you through a beautiful meadow and allows you to glimpse back at Greyrock for some beautiful views of the entire rock. This is a great meadow to run through during sunset, with the sun setting in front of you and Greyrock behind you. While you can take this trail up, it will reveal Greyrock about a mile or two before you are actually there. If you take Greyrock Trail #946 up, you won't be able to see it until you're almost to the upper junction, which allows for more surprise in the beauty.
Land Manager: USFS - Arapaho & Roosevelt National Forests Office
May 20, 2019: Canyon Lakes Ranger District Kids Fishing Fest June 1
May 12, 2019: Canyon Lakes Ranger District Firewood Program