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866 ft
Distance
-66 ft
Descent
00:00:55
Avg time
-66 ft
Altitude change
231 ft
Altitude min
297 ft
Altitude max
297 ft
Altitude start
230 ft
Altitude end
-7.6%
Grade
-16.5%
Grade max
-3.9%
Grade min
866 ft
Distance down
00:00:55
Avg time
42 to 21 Details
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Activities
- Mountain Bike
- Hike
- Trail Running
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Riding AreaNoanet Woodlands
Dover, Massachusetts -
Difficulty Rating
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Local Popularity55 in Mountain Biking [+]
- 5 in Trail Running
- 100 in Hiking
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Global Ranking
-
State Ranking
-
Hiking SAC ScaleT1 Hiking
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Trail TypeSingletrack
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Snow GroomingBackcountry
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Bike TypeAM, XC
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DirectionDownhill Primary[+]
- Downhill Primary for Trail Running
- Downhill Primary for Hiking
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Climb DifficultyBlack Diamond
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Physical RatingHard
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Trail VisibilityAlways easy to follow
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Family FriendlyYes
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Dogs AllowedYes
Known as "Noanet Roller Coaster" on Strava. Riding it east-to-west gives you a pretty intense and very fun undulating descent, with the final downhill section being the steepest and gnarliest. Almost impossible to climb if the conditions aren't ideal, but a worthy challenge to take on (billy goat status if you can clean the climb).
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
- 0 rides
6 Months
- 19 rides
- 9 miles avg distance
All
- 182 rides
- Last: Oct 20, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
42 to 21 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 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
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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
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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.
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Activity Recordings
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BC Backroad Status
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Directions to 42-to-21 trailhead
(42.232910, -71.260520)
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- By WillieJacobsz
Trailforks SBP SWW & contributors - #172098 - 806 views
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