5.0
(3)
35
riders
9
rides
Mountain biking in Lost Lake Recreation Area, located in Middlesex County, features a network of trails characterized by rolling hills, dense woodlands, and scenic waterways. The region offers diverse terrain, including dedicated rail trails and paths winding through plantations and around ponds. Elevations are generally moderate, with routes often leading to lookout points providing expansive views of the surrounding natural environment.
Last updated: May 1, 2026
8
riders
20.8km
01:49
210m
210m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
5
riders
10.8km
00:59
140m
140m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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2
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
5.0
(2)
9
riders
29.0km
01:32
100m
100m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
5.0
(1)
7
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Paved route through the woods, although best taken at a slow speed to both enjoy the scenery, and accommodate runners, joggers, walkers, and small kids just learning to ride. Save the road racing for out on the roads.
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The Nashua River Rail Trail is a paved trail that was constructed on an old railbed. It is completely traffic free, so it is a great place for a relaxed walk.
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This is the northern terminus of the Nashua River Trail. It runs from this point all the way to Ayer, Massachusetts. The trail passes through J. Harry State Forest and is tree lined for a majority of its trajectory.
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One of the older trails in the state but a great one. Some lovely views of the river at various points
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This old homestead is meant to function as a buffer for Baddacook Pond, the water supply for the nearby town of Groton. But it also opens up vistas over the water, so it's a really nice place to bike past.
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This stretch of conservation land abuts the Nashua River Rail Trail. You're free to explore the land if you want to hop off your bike, but it's kept in such a natural state that you won't even find maintained trails on it.
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From here all the way south to Ayer, this 12.5 miles trail follows the course of the Nashua River through J. Harry State Forest. Calm and tree-dimmed light make the way a real treat.
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The Nashua River Rail Trail is a paved trail that was constructed on an old railbed. It is completely traffic free, so it is a great place to do training runs.
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Lost Lake Recreation Area offers a network of 11 mountain bike trails. These routes vary in length and difficulty, providing options for different skill levels.
The terrain in Lost Lake Recreation Area is characterized by rolling hills, dense woodlands, and scenic waterways. You'll find a mix of dedicated rail trails and paths winding through plantations and around ponds, offering a diverse natural environment.
Yes, there are several easy trails perfect for beginners or family outings. For example, the Wharton Plantation loop from Millstone Hill Satellite Tracking Radar is an easy 8.9-mile route with gentle elevation changes. Another accessible option is the Nashua River Rail Trail – Nashua River Rail Trail loop from Groton, which is also rated as easy.
While many trails are easy, there are moderate options for those seeking more challenge. The Martins Pond – Chestnut Hill loop from Groton, for instance, is a moderate 15.5-mile path that features varied terrain and ascents for scenic views.
Yes, many routes lead to lookout points providing expansive views of the surrounding natural environment. The Martins Pond – Chestnut Hill loop from Groton ascends Chestnut Hill for scenic vistas, and the View from Lookout Rock – Oak Hill Forest Trails loop from Littleton specifically highlights a viewpoint.
Most of the mountain bike routes in Lost Lake Recreation Area are designed as loops, allowing you to start and finish at the same point. Examples include the Wharton Plantation loop, the Martins Pond – Chestnut Hill loop, and the Bear Hill loop.
Yes, many of the trailheads and starting points for mountain bike routes, such as those near Millstone Hill Satellite Tracking Radar and Groton, typically offer parking facilities for visitors.
Based on available information, there are no specific permits mentioned as being required for mountain biking on the general trails within Lost Lake Recreation Area.
Given the dense woodlands and natural environment of Lost Lake Recreation Area, you may encounter various local wildlife. Keep an eye out for common forest animals and a variety of bird species while on the trails.
The mountain bike routes in Lost Lake Recreation Area are highly rated by the komoot community, with an average score of 5.0 stars from multiple reviews. Riders often praise the varied terrain, well-maintained paths, and scenic beauty of the area.
Mountain biking in Lost Lake Recreation Area is generally enjoyable during spring, summer, and fall. The specific conditions can vary, so checking local weather forecasts and trail reports before your ride is always recommended.
While many outdoor areas are dog-friendly, it's always best to check specific regulations for Lost Lake Recreation Area or individual trail systems regarding pets. If allowed, ensure your dog is on a leash and you clean up after them.


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