Red Line Path and Bear Hill Trail is a 3.4 mile moderately trafficked loop trail located near Groton, Massachusetts that features a lake and is rated as moderate. The trail is primarily used for hiking, running, nature trips, and snowshoeing.

Length3.4 miElevation gain242 ftRoute typeLoop
kid friendlyHikingNature tripsSnowshoeingRunningForestLakeViewsWildlife
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Reviews (36)
Photos (72)
Recordings (36)
Completed (61)
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Christine Malette
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Hiking
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Michael Sullivan
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Hiking
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Nancy Felsheim
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HikingBlowdownFloodedIcySnow

The Red Line Trail runs along a long, high esker with still wetlands or running water on both sides. This time of year the wetlands were iced over and pretty although I imagine they are also lovely in other seasons. The Bear Hill Trail on the back-end completes the loop and has its charms too. To connect the two trails you walk down a paved residential road for about 1/2 mile. The trails were icy and slick in many places so it was slow going for the most part. There were a couple of places where the trail dipped and went over good-sized, icy bodies of water so figuring out how to get across safely was fun and kept it interesting.

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Heather Gearan
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HikingBlowdown

This is a tricky one. There are real plusses and minuses, so I averaged it out to a 4. First, the plusses. The landscapes are eerily gorgeous. The first mile you walk along a wide path with blown down trees to the side. It looks like the aftermath of a tornado or explosion. Part of this is along an esker (?) so you are above a swamp on one side and the blowdown on the other. A really nice environment. Also, until the very end, we saw no one else on this path on a gloriously sunny Sunday. So that's a plus for me. On the other hand, there was close to a mile section on a very windy street with no shoulder where you needed to practically cling to the shoulder (with a steep drop-off) to avoid getting run over. Also, there were no blazes whatsoever, so following the right path required frequent checking to see whether your little red line was staying on the trail. Having said all that, I was glad that we hiked it for the natural beauty aspect alone.

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Jim Ray
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Hiking

Confusing to follow, but very pretty!

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Barbara Bardzik
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Hiking
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Alan Starr
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HikingGreat!

As Penny mentioned, the paths are all cleared now, no more obstructions. Overall, a nice easy hike with some pretty woods, and nice view from the top of the hill near the quarry.

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Alan Starr
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Penny Lacroix
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Hiking

lots of work has been done on these trails in the last 4 months since the microburst in May. The trails are cleared for the most part. We enjoyed the quarry and the pond. Be careful with children around the quarry!

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Carolyn Paneral
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HikingBugsClosed

closed. sign posted. trees blocking paths. dirt road you can walk a little instead

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Donald Spencer
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Running

Armageddon, total Armageddon Great Adventure if you’re into that

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Shoshana Burgett
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HikingRockyScrambleWashed out

Trail is a mess. Lots of downed trees and construction plowing through for some type of new work. Wear good shoes or boots for sure as the paths are now muddy and chipped wood and trenches from big diggers. Once done it will be lovely and five stars. For now it is three.

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Robin Gross
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HikingBlowdownScramble

After the storm this week, tons of trees are down! Fun to climb over, but not worth your time to do the hike. Wait until trail is cleared.

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Larry E
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Hiking

The first part of this trail, especially if you go off the main trail to the left, is very pretty, as you walk along a ridge with water on both sides of you. Towards the point furthest away from the beginning, you then have to walk on a hardtop road for quite a while which is kind of boring and dangerous as there are no sidewalks. Once you then re-enter the woods, the trail is fine again.

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Emanuel Valente
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HikingOff trailPrivate property
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Eric Henry
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Hiking
First to Review

Enjoyable walk. I think it was more easy than moderate. Very quiet on the Saturday after Thanksgiving. Only saw two other groups. nice view from the to of mountain.

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Ian Hambelton
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Hiking
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Jessica Hamilton
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Hiking
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Michael Powell
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Hiking
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Seth Rowsam
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Hiking
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Greg Halloran
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Hiking
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Christophe Henry
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