Sudbury Reservoir – Callahan State Park (entrance) loop from Sawink Farm Reservation
Sudbury Reservoir – Callahan State Park (entrance) loop from Sawink Farm Reservation
2.7
(9)
90
riders
Sudbury Reservoir – Callahan State Park (entrance) loop from Sawink Farm Reservation
01:06
25.3km
180m
Road cycling
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride. The starting point of the route is right next to a parking lot.
Last updated: April 24, 2026
Tips
Your route passes through a protected area
Please check local regulations for:
Sudbury Dam Historic District
Waypoints
Start point
Parking
Get Directions
2.68 km
View of Wachusett Reservoir
Highlight • Lake
Tip by
6.71 km
Sudbury Reservoir
Highlight • Lake
Tip by
12.5 km
Callahan State Park (entrance)
Highlight • Rest Area
Tip by
13.7 km
Parmenter Street
Highlight (Segment) • Cycleway
Tip by
18.2 km
View of Marlborough Brook and Sudbury Reservoir
Highlight • Viewpoint
Tip by
25.3 km
End point
Parking
Way Types & Surfaces
Way Types
23.4 km
1.52 km
427 m
Surfaces
24.0 km
1.22 km
< 100 m
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Elevation
Highest point (110 m)
Lowest point (60 m)
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Weather
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Today
Friday 24 July
28°C
13°C
0 %
Additional weather tips
Max wind speed: 7.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Description
Let's be upfront: the specific "Sudbury Reservoir – Callahan State Park (entrance) loop from Sawink Farm Reservation" is unfortunately not suitable or permitted for road cycling as a continuous loop due to explicit prohibitions. While Komoot's data suggests a 15.7-mile (25.3 km) route with 570 feet (174 metres) of elevation gain, rated easy and taking about 1 hour and 3 minutes, significant portions are off-limits to bikes. This means that while the area offers some fantastic cycling, this particular named loop isn't the easy, quick ride it appears to be for road cyclists.
What to expect on Sudbury Reservoir – Callahan State Park (entrance) loop from Sawink Farm Reservation
If you were to explore the permitted areas around this route, you'd find diverse landscapes. Callahan State Park, for instance, features a mix of woodlands and open fields, with some paved sections suitable for easy bike rides. You might catch picturesque views of the Sudbury Reservoir from external roads or paths that skirt the prohibited watershed property. However, be aware that many trails within Callahan are unpaved, making a hybrid or mountain bike more suitable for full exploration. The terrain generally consists of gentle rolling hills, offering a varied experience for those on permitted routes.
Planning your visit
Planning for this specific loop requires a major adjustment: you cannot cycle it as described. Bicycling is strictly prohibited on properties managed by the Sudbury Valley Trustees, including Sawink Farm Reservation, and on Sudbury Watershed Property around the reservoir. Instead, consider exploring the designated cycling paths within Callahan State Park or designing a route using public roads that encircle the reservoir, carefully avoiding restricted areas. Always check local regulations and trail signage before heading out, as ignoring these prohibitions can lead to fines and damage to sensitive ecosystems.
Trail details
- Distance: 15.7 miles (25.3 km)
- Elevation gain: 570 feet (174 metres)
- Difficulty: easy
- Estimated time: 1 hours and 3 minutes
Comments
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