Wachusett Reservoir
🌤 Weather at Wachusett Reservoir by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 26–67 °F | 56–80 °F | 32–71 °F | 17–38 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Worcester Rgnl Airport, 12 mi away, elevation 1,000 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
🏆 65 Billion Gallons — Massive reservoir supplying 2.2 million people — MA’s second-largest body of water with 37 miles of shoreline
Wachusett Reservoir holds 65 billion gallons of water across 4,135 surface acres — Massachusetts’ second-largest body of water (after Quabbin). The reservoir supplies drinking water to 2.2 million people in the greater Boston area. With 37 miles of shoreline surrounded by protected watershed, the reservoir area supports bald eagles, osprey, and diverse wildlife. The nearby Wachusett Mountain (2,006 feet) — a popular ski area — provides the reservoir’s dramatic backdrop.
Visitor Information
| Detail | Information |
|---|---|
| Location | Clinton/Boylston/Sterling, Worcester, MA |
| Size | 4,135 acres, 37mi shoreline! |
| Entry Fee | Free |
| Water | 65 BILLION gallons! |
| People | Supplies 2.2 million! |
Frequently Asked Questions
Can I fish in the reservoir?
Shore fishing is permitted in designated areas with a Massachusetts fishing license — Wachusett is known for excellent largemouth bass, trout, and landlocked salmon. No boats or swimming allowed (it’s drinking water!).
Where does Boston’s water come from?
Boston’s water flows from the Quabbin Reservoir (412 billion gallons) through an aqueduct to the Wachusett Reservoir (65 billion gallons), then to treatment facilities and the city. The system, built over decades (1897-1946), is considered one of the finest public water supplies in America — Quabbin’s watershed is so well-protected that Boston’s water requires minimal treatment.
More parks nearby: Sudbury Reservoir is a short drive away, while Quinsigamond State Park lies a short drive away.
About Wachusett Reservoir
Wachusett Reservoir in central Massachusetts is the primary drinking water supply for 2.5 million people in the Boston metropolitan area. The 4,135-acre reservoir (one of the largest in New England) is surrounded by protected watershed lands. Bald eagles, osprey, and loons have returned to the reservoir as water quality improved. The reservoir sits below the dramatic profile of Mount Wachusett.
Things to Do
Walking and jogging the perimeter paths, birdwatching for bald eagles and loons, fishing (shoreline only, with permit), and enjoying views of Mount Wachusett reflected in the water. The nearby Mount Wachusett State Reservation offers hiking and skiing.
Insider Tips
Boston’s water: Wachusett Reservoir holds 65 billion gallons — providing drinking water to 2.5 million people in the Boston metro area. Pro tip: The reservoir shoreline offers 37 miles of walking and fishing access — it’s one of the best bass fishing spots in Massachusetts. No swimming: Swimming and boating are prohibited (it’s a drinking water supply) — but the fishing is excellent.
Best Time to Visit
Fall: Reservoir reflections and foliage. Spring/summer: Bass and trout fishing. Winter: Eagle watching — bald eagles overwinter on the reservoir. Year-round: Walking paths open daily.
🐾 Dogs & Pets at Wachusett Reservoir
- Pets allowed? statewide rule
- The Massachusetts Department of Conservation and Recreation (DCR) welcomes dogs on-leash in most state parks, forests and reservations, though a list of specific properties prohibits dogs for safety, health or habitat reasons.
- Leash rule statewide rule
- Leash of no more than 10 feet in on-leash areas; dogs must be on-leash in all parking areas.
- Beaches & swim areas statewide rule
- Dogs are not allowed on DCR coastal beaches or in designated swimming areas of inland beaches from May 1 through September 15; shorebird-nesting beaches are closed to dogs April 1 - September 15.
- Cabins & lodging statewide rule
- Dogs are not allowed in cabins, yurts and the encompassing areas (no pet-friendly cabin program).
- Statewide exceptions statewide rule
- Designated off-leash areas at ~20 properties (e.g. Bark Place at Breakheart Reservation); max 4 dogs per person; dogs banned entirely at Walden Pond, Moore State Park, Sandy Point and Boston Harbor Islands.
Are dogs allowed at Wachusett Reservoir?
The Massachusetts Department of Conservation and Recreation (DCR) welcomes dogs on-leash in most state parks, forests and reservations, though a list of specific properties prohibits dogs for safety, health or habitat reasons. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via mass.gov. More: Massachusetts state parks guide · Dog rules in all 50 states compared
Park Location
Plan your gear for Wachusett Reservoir
From our editorial guides, matched to this park’s activities:
