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1,932 ft
Distance
9 ft
Climb
-11 ft
Descent
00:04:27
Avg time
-4 ft
Altitude change
168 ft
Altitude min
180 ft
Altitude max
175 ft
Altitude start
171 ft
Altitude end
-0.2%
Grade
-5.9%
Grade max
4.5%
Grade min
404 ft
Distance climb
558 ft
Distance down
968 ft
Distance flat
00:04:27
Avg time
Keyes Loop Details
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Activities
- Mountain Bike
- Hike
- Trail Running
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Riding AreaGreat Brook Farm State Park
Carlisle, Massachusetts -
Difficulty Rating
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Local Popularity100 in Mountain Biking [+]
- 95 in Trail Running
- 100 in Hiking
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Global Ranking
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Trail TypeSingletrack
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Bike TypeXC, Fat
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DirectionBoth Directions
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Climb DifficultyGreen
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Physical RatingEasy
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Trail VisibilityAlways easy to follow
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SeasonApril - November
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Dogs AllowedYes
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eBike Allowed
Easy but fun. Lots of tight twists, less rocky than other GB trails.
Access Info
Access from Pine Point Loop
Local Trail Association
-
-
Please consider joining or donating to the local trail association to supportDonate to earn trail karma!
trail development & maintenance.
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 10 rides
- 8 miles average
6 Months
- 121 rides
- 11 miles avg distance
All
- 1,101 rides
- Last: Jun 5, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
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Trail Conditions
- Unknown
- Snow Groomed
- Snow Packed
- Snow Covered
- Snow Cover Partial
- Freeze/thaw Cycle
- Icy
- Prevalent Mud
- Wet
- Variable
- Ideal
- Dry
- Very Dry
Trail Flow (Ridden Direction)
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The colour categories are based on what percentage of riders are riding a trail in its intended direction.
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- > 90%
- > 80%
- > 70%
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- < 50%
- bi-directional trail
- no data
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- < 2 weeks
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- > 6 months
Trail Ridden Direction
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- Downhill Only
- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
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Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
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Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
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BC Backroad Status
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Directions to keyes-loop trailhead
(42.553070, -71.340420)
Videos
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Routes with this trail
★ 2.7 • 14 miles • 607 ft • 6 •
Great Brook farm advanced loop. It was created and is maintained by NEMBA.
★ 5.0 • 29 miles • 1,745 ft • 46 • Loop •
A loop Featuring trails from Farm State Park, Russtle Mill State Forest, and Billrica trails.
★ 3.4 • 11 miles • 579 ft • 17 • Out & Back •
This is an intermediate 12 mile route which leaves from the Ski parking area. The route starts out on the...
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Nearby Trails
- Tophet East Trail 807 ft
- Beaver Loop 1,424 ft
- Parking Connector 1,424 ft
- Meadow Pond Path 1,686 ft
- Water's Edge 1,965 ft
Great Brook Farm State Park
- By menbatthews
& contributors - #68960 - 1,698 views
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Frequently Asked Questions About Keyes Loop
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Where is Keyes Loop located?
Keyes Loop is located in Great Brook Farm State Park, Carlisle, Massachusetts, United States. It is part of the Great Brook Farm State Park trail network. The trailhead is located at coordinates 42.55307, -71.34042.
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How hard is Keyes Loop?
Keyes Loop is rated as Blue difficulty. The physical rating is Easy. The average grade is 0.2%. The climb difficulty is rated Green.
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What is the elevation gain for Keyes Loop?
Keyes Loop has 3 m of elevation gain. The trail has 3 m of elevation descent. The elevation ranges from 51 m to 55 m.
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Is Keyes Loop a point to point trail?
Keyes Loop is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
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