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2,178 ft
Distance
29 ft
Climb
-23 ft
Descent
00:04:55
Avg time
5 ft
Altitude change
177 ft
Altitude min
195 ft
Altitude max
177 ft
Altitude start
184 ft
Altitude end
0.2%
Grade
-10.4%
Grade max
8.3%
Grade min
850 ft
Distance climb
653 ft
Distance down
676 ft
Distance flat
00:04:55
Avg time
Inner Loop Details
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Activities
- Mountain Bike
- Hike
- Trail Running
- Snowshoe
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Riding AreaBillerica State Forest
Billerica, Massachusetts -
Difficulty Rating
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Voted DifficultyBlack Diamond (2 votes)
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Local Popularity80 in Mountain Biking [+]
- 90 in Trail Running
- 70 in Hiking
- 80 in Snowshoeing
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Global Ranking
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Hiking SAC ScaleT1 Hiking
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Trail TypeSingletrack
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DirectionBoth Directions
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Trail VisibilityAlways easy to follow
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Dogs AllowedYes
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eBike Allowed
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Land OwnerDCR
Fun, feature filled interior loop within the larger Northern Loop trail. Located at the bottom near the access road, starts as a short lollipop. Can be ridden either way. Blue trail with some black features. Initial monster rock not too difficult if scoped carefully.
Local Trail Association
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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
- 2 rides
- 8 miles average
6 Months
- 124 rides
- 9 miles avg distance
All
- 1,531 rides
- Last: Jul 4, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Inner Loop Trail Reports
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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.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Ridden
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- < 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
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Trail Popularity ?
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Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
Think of this as a heatmap, more rides = more kinetic energy = warmer colors.
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- popular
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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.
Jump Magnitude Heatmap
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BC Backroad Status
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Slope Aspect
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Directions to inner-loop-154806 trailhead
(42.573830, -71.298490)
Photos
2 more »
Videos
2 more »
youtuber
![Fatbiking Russell Mill Pond and Billerica Town...]()
14:32 |
376 |
Feb 10, 2021 , Billerica
8:39 |
647 |
Jun 27, 2020 , Billerica
Technical Trail Features (TTF)
- Rock Roller
Rock Face
Routes with this trail
★ 5.0 • 29 miles • 1,745 ft • 46 • Loop •
A loop Featuring trails from 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 will not be marked. Navigation is required.
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Nearby Trails
- Inside Loop Connector 207 ft
- Northern Loop Connector 623 ft
- Winning Street Fire Road 1,237 ft
- Northern Loop 1,831 ft
- Gilson Hill Loop 1,857 ft
Billerica State Forest
- By bigwheels87
& contributors - #154806 - 1,645 views
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Frequently Asked Questions About Inner Loop
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Where is Inner Loop located?
Inner Loop is located in Billerica State Forest, Billerica, Massachusetts, United States. It is part of the Billerica State Forest trail network. The trailhead is located at coordinates 42.57383, -71.29849.
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How hard is Inner Loop?
Inner Loop is rated as Blue difficulty. The average grade is 0.2%.
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What is the elevation gain for Inner Loop?
Inner Loop has 29 ft of elevation gain. The trail has 23 ft of elevation descent. The elevation ranges from 177 ft to 195 ft.
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Is Inner Loop a point to point trail?
Inner Loop is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
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