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Sudbury Reservoir – Callahan State Park (entrance) loop from Donovan Drive

Sudbury Reservoir – Callahan State Park (entrance) loop from Donovan Drive

Moderate

4.6

(3177)

5,942

riders

Sudbury Reservoir – Callahan State Park (entrance) loop from Donovan Drive

01:48

41.5km

330m

Road cycling

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: April 19, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Sudbury Dam Historic District

Waypoints

Start point

Bus stop

Get Directions

9.68 km

Sudbury Reservoir

Highlight • Lake

The Sudbury Reservoir is about 5,000 acres in size and is the emergency backup water supply for Boston. It has numerous large brooks running into it, numerous islands, and is …

Tip by

17.7 km

Sudbury River

Highlight • River

The Sudbury River is a rather short 32.7-mile-long (52.6 km) tributary of the Concord River. It might be small but it has become a popular walking, hiking, kayaking and biking …

Tip by

30.2 km

View of Marlborough Brook and Sudbury Reservoir

Highlight • Viewpoint

The views out over both arms of Marlborough Brook here are super nice as you go over the bridge. The brook runs into, and is really a part of Sudbury …

Tip by

33.8 km

Parmenter Street

Highlight (Segment) • Cycleway

Parmeter Street is a quiet street that borders Pine Hill and the surrounding area on the eastern side of the Sudbury Reservoir.

Tip by

36.3 km

Callahan State Park (entrance)

Highlight • Rest Area

The Red Tail Trail in front of you is one of the entrances to Callahan State Park. This Park offers you magnificent paths and the nature of New England in all its magnificence.

Tip by

37.2 km

Overly Conservation Restriction

Nature Reserve

38.6 km

Waters & Weir Fields

Nature Reserve

41.5 km

End point

Bus stop

Way Types & Surfaces

Way Types

38.6 km

2.64 km

202 m

Surfaces

39.1 km

2.32 km

< 100 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (140 m)

Lowest point (50 m)

Weather

Today

Sunday 7 June

26°C

14°C

73 %

Additional weather tips

Max wind speed: 23.0 km/h

to get more detailed weather forecasts along your route

Comments

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Sudbury Reservoir – Callahan State Park (entrance) loop from Donovan Drive

Sudbury Reservoir

Sudbury River

View of Marlborough Brook and Sudbury Reservoir

Parmenter Street

Callahan State Park (entrance)

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