A freshwater pond known locally as "The Res," with a sandy beach, bathhouse and lifeguards in summer; also used for fishing and non-motorized boating outside the roped swim area.
What to expect
Entry fee
Resident $7/person or $28 family max per day; non-resident $10/person or $40 family max per day checked Jul 16, 2026
Dogs
Not permitted on the beach during swim season (June-August)
Allowed now · ban starts JuneHours
Weekends 12-6pm noted for shoulder season; regular-season daily hours not separately confirmed
Swim
Allowed Jun-Aug, lifeguard hours only
Fishing
Allowed outside swim season on the beach; year-round elsewhere
Kayak/Canoe/Sup
Allowed non-motorized craft, in-season
Managed by
Lexington Recreation & Community Programs Department - Aquatics
781-698-4930 · WebsiteWhat's here
On site
Picnic area
Picnic tables outside the bathhouse
Common questions
Yes, but only during posted hours when a lifeguard is on duty.
Not on the beach during the June-August swim season.
Is this good for young kids?
It has a sandy, gently sloped beach and a roped-off swim area with lifeguards, which makes it manageable for families, though there is no beach wheelchair or Mobi-Mat confirmed.
Is there an entry fee at The Old Reservoir?
Yes, Resident $7/person or $28 family max per day; non-resident $10/person or $40 family max per day
Can I bring my dog to The Old Reservoir?
Not permitted on the beach during swim season (June-August)
What rules should I know at The Old Reservoir?
Swim diapers required for non-toilet-trained children; individuals with open cuts, bandages or communicable disease may not enter the water. No dogs on the beach during swim season (June-August). Fishing not permitted on the beach during swim season. No swimming without a lifeguard on duty;…