Open in App
Get this trail on your phone instantly.
more stats
1.4 miles
Distance
157 ft
Climb
-162 ft
Descent
00:17:04
Avg time
-4 ft
Altitude change
194 ft
Altitude min
312 ft
Altitude max
235 ft
Altitude start
230 ft
Altitude end
-0.1%
Grade
-12.1%
Grade max
11.6%
Grade min
3,232 ft
Distance climb
3,009 ft
Distance down
1,263 ft
Distance flat
00:17:04
Avg time
Gilson Hill Loop Details
-
Activities
- Mountain Bike
- Hike
- Trail Running
- Snowshoe
-
Riding AreaBillerica State Forest
Billerica, Massachusetts -
Difficulty Rating
-
Local Popularity85 in Mountain Biking [+]
- 5 in Trail Running
- 75 in Hiking
- 5 in Snowshoeing
-
Global Ranking
-
State Ranking#396 in Mountain Biking · Massachusetts [+]
- #4,649 in Trail Running
- #4,464 in Hiking
- #401 in Snowshoeing
-
Trail TypeSingletrack
-
Bike TypeXC
-
DirectionBoth Directions
-
Climb DifficultyBlue
-
Physical RatingModerate
-
Trail VisibilityAlways easy to follow
-
Dogs AllowedYes
-
TTFs on TrailBerm, Drop, Jump
-
Land OwnerDCR
MVNEMBA design at it's finest. Good use of terrain with a little Sidewinder thrown in.
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
- 7 rides
- 10 miles average
6 Months
- 209 rides
- 10 miles avg distance
All
- 1,954 rides
- Last: Nov 8, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Gilson Hill Loop Trail Reports
more »
close
3D
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)
Trailforks scans users activity logs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Used
Trailforks scans activity logs to determine the last time a trail was ridden.
- < 2 days
- < 1 week
- < 2 weeks
- < 1 month
- < 6 months
- > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
- Downhill Only
- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
Contribute Details
Colors indicate trail is missing specified detail.
- Description
- Photos
- Description & Photos
- Videos
Trail Popularity ?
Trailforks scans activity logs to determine which trails are ridden the most in the last 9 months.
Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
Think of this as a heatmap, more activities = more kinetic energy = warmer colors.
- most popular
- popular
- less popular
- not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches
US Cell Coverage
Legend
Radar Time
Activity Recordings
Trailforks uses anonymized public activity data.
?
Activity Recordings
Trailforks uses anonymized public activity data.
?
Winter Trails
Warning
A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
Missing Trails
Most Popular
Least Popular
Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
Jump Magnitude Heatmap
Heatmap of where users jump on trails. Zoom in to see individual jumps, click circles to view jump details.
BC Backroad Status
![map legend]()
Service Road Atlas is a free to use, community-driven service for viewing and creating reports on the numerous back-country service roads around B.C. and Alberta.
Slope Aspect
Direction the slope faces
Trails Deemphasized
Trails are shown in grey.
Only show trails with no bike usage.
Suggested Layers
Based on selected activity type
Save the current map location and zoom level as your default home location whenever this page is loaded.
Save
Directions to gilson-hill-loop trailhead
(42.571420, -71.301270)
Photos
10 more »
Videos
1 more »
Routes with this trail
★ 5.0 • 29 miles • 1,745 ft • 46 • Loop •
A loop Featuring trails from Great Brook Farm State Park, Russtle Mill State Forest, and Billrica trails.
★ 2.5 • 30 miles • 1,840 ft • 57 • Loop •
2024 NEMBA PK Memorial Advanced ride route. The route outside of Great Brook will not be marked....
6 Reviews & Comments
dbruce2893
A great trail, that absolutely rides in both directions. I have to say though, there must be some confusion about the way clocks work or there’s some kind of messed up inside joke recommending clockwise. Objectively, this trail should be ridden counter clockwise (backwards on Trailforks). 75-80% are very biased that direction. By all means, give it a ride in each direction, but if you want to hit the most features and not climb up past them, ride this in reverse.
scott4238
fun in both directions as there are features that only work in one direction. Counter clockwise your going to get a relatively straight steep descent and have to climb up the windier trails. I prefer clockwise as it turns those tight corners into higher speed sweepers that are a lot of fun. You can grind out the steep straight climb
Aemancini
Do not underestimate the size of this mountain... can’t wait to go back... also do it clockwise, I did it counter and it seems more fun the other way
We hope you've been enjoying Trailforks!
Create a FREE account to view all trail reviews and much more.
Nearby Trails
- Northern Loop 23 ft
- Fire Road 7 548 ft
- Inner Loop 1,155 ft
- Fire Road 6 1,230 ft
- Inside Loop Connector 1,250 ft
Billerica State Forest
- By Sofakingfast
MV NEMBA & contributors - #45016 - 4,714 views
- Follow/Subscribe
- login to download gpx or kml files.
Hit the Trail
Download Trail
Save to wishlist, Garmin & download.
Find Related Routes
Find routes and users activities that include this trail.
You must enter a description before submitting.