US lakes & pondsUS lakes & pondsSurface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 50524493).
The red circle marks Mount Williams Reservoir.
Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline.
Official MassWildlife pages. Rules and fees change; check before you go.
No public access sites are listed for this water in the MassWildlife Office of Fishing & Boating Access sites (MassGIS) data.
Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 50524493), public domain. State outline: U.S. Census Bureau TIGERweb. Points: MassWildlife Office of Fishing & Boating Access sites (MassGIS). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.
We found 13 campgrounds and RV parks within 15 miles of Mount Williams Reservoir, 5 of them within 5 miles. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.
RVs welcome · Tent sites
All campgrounds & RV parks in Massachusetts
Green tent icons on the lake map mark campgrounds near the shore, and the interactive map shows the closest 12. Amenities are listed only where a source records them; call or check the campground's website before you go, since seasons and rates change every year.
Campground data: OpenStreetMap contributors (ODbL). Pulled Oct 12, 2026.
Live from the National Weather Service API for the lake's coordinates (42.6852, -73.1530). The nearest station may be several miles away. NWS forecast for Mount Williams Reservoir. No live water-temperature sensor is shown because we haven't found a public one for this lake.
Based on solunar theory, an estimate. Major periods (about 2 hours) center on when the moon is directly overhead or underfoot; minor periods (about 1 hour) center on moonrise and moonset. The 0–100 activity score rises during those periods and gets a boost near sunrise and sunset and around the new and full moon. Weather, water temperature and pressure often matter more. Sun and moon times are calculated in your browser from the lake's coordinates with standard astronomy formulas, shown in ET (America/New_York), and accurate to within a few minutes.
Straight-line distance between lake centers. All Massachusetts lakes & ponds · All waters in North Adams