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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)
Trailforks scans users ridelogs 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 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
Trailforks scans ridelogs 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 ridelogs 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 rides = more kinetic energy = warmer colors.
- most popular
- popular
- less popular
- not popular
ATV/ORV/OHV Filter
Max Vehicle Width
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Legend
Radar Time
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Activity Recordings
Trailforks users anonymized public ridelogs from the past 6 months.
- mountain biking recent
- mountain biking (>6 month)
- hiking (1 year)
- moto (1 year)
Activity Recordings
Trailforks users anonymized public skilogs from the past 12 months.
- Downhill Ski
- Backcountry Ski
- Nordic Ski
- Snowmobile
Winter Trails
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A routing network for winter maps does not exist. Selecting trails using the winter trails layer has been disabled.
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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 riders jump on trails. Zoom in to see individual jumps, click circles to view jump details.
Trails Deemphasized
Trails are shown in grey.
Only show trails with NO bikes.
Save the current map location and zoom level as your default home location whenever this page is loaded.
SaveNorthfield Brook Lake (NBL) consists of 208 acres of public land in the town of Thomaston, Connecticut. 6 miles of multi-use trails suitable for mountain biking and hiking currently exist. Local members from the Northwest Connecticut Chapter of the New England Mountain Bike Association build and maintain the trail system with support from the U.S. Army Corps of Engineers.
Primary Trail Type: Cross-Country
eBikes Allowed:
No
AKA: NBL
Land Status: Military Managed
Land Manager: U.S. Army Corps of Engineers

Access Info:
Access to the trail network can be found from various points within the NBL recreation area. There is a secondary parking area on Edwin Lane (small lot to the right of the athletic fields) in the Highwood Farm neighborhood, with an access trail starting from Julia Lane.
Disclaimer:
NBL trails are blazed, but there are currently no trail maps displayed within the area. Ride at your own risk. The trail system is multi-use. Please respect trail runners and hikers.
Links
Activities Click to view
- Mountain Bike
14 trails
- Hike
19 trails
- Trail Running
19 trails
Region Details
- 4
- 5
- 5
Region Status
Open as of Feb 13, 2025Stats
- Avg Trail Rating
- Trails (view details)
- 15
- Trails Mountain Bike
- 18
- Trails Hike
- 19
- Trails Trail Running
- 19
- Total Distance
- 7 miles
- Total Descent Distance
- 3 miles
- Total Descent
- 1,209 ft
- Total Vertical
- 250 ft
- Highest Trailhead
- 777 ft
- Reports
- 85
- Photos
- 31
- Ridden Counter
- 2,031
Popular Northfield Brook Lake (NBL) Trails
Photos of Northfield Brook Lake (NBL) Mountain Bike
trail: Sasquatch (green blaze)
120 |
Apr 4, 2021 @ 5:19am
Apr 4, 2021
trail: Pitch (red blaze)
76 |
Nov 24, 2020 @ 12:35pm
Nov 24, 2020
trail: Pitch (red blaze)
72 |
Nov 24, 2020 @ 12:35pm
Nov 24, 2020
trail: Pitch (red blaze)
68 |
Nov 24, 2020 @ 12:35pm
Nov 24, 2020
trail: Pitch (red blaze)
48 |
Nov 24, 2020 @ 12:34pm
Nov 24, 2020
trail: Pitch (red blaze)
53 |
Nov 24, 2020 @ 12:34pm
Nov 24, 2020
trail: Pitch (red blaze)
55 |
Nov 24, 2020 @ 12:34pm
Nov 24, 2020
trail: Pitch (red blaze)
62 |
Nov 24, 2020 @ 12:34pm
Nov 24, 2020Videos of Northfield Brook Lake (NBL) Mountain Bike

trail: Goat Path (green blaze)
0:46 |
125 |
Feb 22, 2023 , Thomaston
Recent Trail Reports
status | trail | date | condition | info | user |
---|---|---|---|---|---|
Highwood Access (green blaze) | Feb 4, 2025 @ 4:40pm Feb 4, 2025 | Dry | GYanosky | ||
Ants (orange blaze) | Feb 4, 2025 @ 4:40pm Feb 4, 2025 | Freeze/thaw Cycle | GYanosky | ||
Goat Path (green blaze) | Feb 4, 2025 @ 4:40pm Feb 4, 2025 | Freeze/thaw Cycle | GYanosky | ||
Upper Yellow Trail (yellow blaze) | Oct 28, 2024 @ 4:32pm Oct 28, 2024 | Dry | Tonyvac2 | ||
Tickler (white blaze) | Oct 28, 2024 @ 4:32pm Oct 28, 2024 | Dry | Tonyvac2 | ||
Upper Yellow Trail (yellow blaze) | Oct 28, 2024 @ 4:32pm Oct 28, 2024 | Dry | Tonyvac2 | ||
Fall Line (red blaze) | Oct 28, 2024 @ 4:32pm Oct 28, 2024 | Dry | Tonyvac2 | ||
Sasquatch (green blaze) | Oct 28, 2024 @ 4:32pm Oct 28, 2024 | Dry | Tonyvac2 | ||
Lower Yellow Trail (yellow blaze) | Oct 28, 2024 @ 4:32pm Oct 28, 2024 | Dry | Tonyvac2 | ||
Pontiac Express (white blaze) | Oct 28, 2024 @ 4:32pm Oct 28, 2024 | Variable | Tonyvac2 |
Activity Feed
username | action | type | title | date |
---|---|---|---|---|
GYanosky | add | report | activity #65728723 and 2 more | Feb 5, 2025 @ 4:46am Feb 5, 2025 |
Tonyvac2 | add | report | activity #61072420 and 9 more | Oct 29, 2024 @ 2:35am Oct 29, 2024 |
GYanosky | add | report | activity #60859790 and 7 more | Oct 24, 2024 @ 4:51am Oct 24, 2024 |
GYanosky | add | report | activity #60602598 and 1 more | Oct 17, 2024 @ 4:52am Oct 17, 2024 |
Bigfoot1120 | wishlist | region | activity #58540575 | Sep 8, 2024 @ 9:56am Sep 8, 2024 |
Recent Comments
username | type | title | comment | date |
---|---|---|---|---|
trail | NBL crew are doing an epic job on this trail.... | Oct 10, 2023 @ 4:51am Oct 10, 2023 | ||
trail | Muddy in the pines, but otherwise very rideable | Apr 3, 2021 @ 2:52pm Apr 3, 2021 |
Nearby Areas
name | distance | ||||
---|---|---|---|---|---|
Harwinton Recreation and Conservation Area | 6 | 10 | 1 | 5.3 km | |
White Memorial Foundation | 4 | 6.6 km | |||
Camp Columbia State Park & Forest | 6.9 km | ||||
Rockwell Park | 8 | 7 km | |||
Sessions Woods WMA | 2 | 7.3 km |
Activity Type Stats
activitytype | trails | distance | descent | descent distance | total vertical | rating | global rank | state rank | photos | reports | routes | ridelogs |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mountain Bike | 14 | 7 miles | 1,207 ft | 3 miles | 249 ft | #2,798 | #1,464 | 32 | 86 | 1,790 | ||
Hike | 19 | 7 miles | 1,207 ft | 3 miles | 249 ft | #2,210 | #1,314 | 86 | 30 | |||
Trail Running | 19 | 7 miles | 1,207 ft | 3 miles | 249 ft | #2,213 | #1,313 | 86 | 14 |
- By nblgreg NorthfieldBL & contributors
- Admins: NorthfieldBL
- #39799 - 6,420 views
- northfield brook lake (nbl) activity log | embed map of Northfield Brook Lake (NBL) mountain bike trails | northfield brook lake (nbl) mountain biking points of interest
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