OARS Celebration of 3 Remarkable Rivers

In celebration of OARS’ 40th year, we are bringing new events and renewed energy to the rivers we call home. From cleanups and invasive species removal parties, to community festivities and live music, there is something for everyone to connect with. Enjoy the beauty, serenity, and fun of the Sudbury, Assabet, and Concord rivers this summer with OARS and community partners, sponsored by the SuAsCo River Stewardship Council.

Upcoming Events

July 11 - July 11, 2026

Join OARS for our first BioBlitz using iNaturalist! WHEN: July 11, 8:30am-10:00am WHERE: Stow Town...

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Our Watershed

399

Sqaure-Mile Watershed

36

Municipalities Served

29

Miles of Federally Designated Wild & Scenic River

Send us the information! We’d love to post community events in and around our rivers. Click the button below to complete a quick form with your event details, and we’ll share it on our calendar of celebration events.

Submit your watershed event

Have event ideas and looking for partnership? Email Grace at communityengagement@oars3rivers.org

Local Organizations to Check Out

~30%

of the SuAsCo rivers watershed is wetlands, crucial for wildlife habitat and water quality

~30%

of water samples in the SuAsCo rivers watershed contain PFAS, leading to increased monitoring and remediation by local authorities and environmental groups

~70%

of dams in the SuAsCo watershed are over a century old, requiring extensive upkeep and presenting obstacles to river restoration and fish passage

>40%

of the land within the watershed is publicly accessible, offering recreational opportunities such as hiking, boating, and birdwatching to the community

~15%

of the land in the SuAsCo rivers watershed is covered by impervious surfaces such as roads, rooftops, and parking lots. This contributes to stormwater runoff and water pollution issues

OARS Celebration of 3 Remarkable Rivers

Join us for a summer of celebration!

Upcoming Events

OARS BioBlitz

July 11 - July 11, 2026

Our Watershed

399

36

29

Have an Event to Feature Here?

More Events and Resources

Local Organizations to Check Out

All OARS Events

SuAsCo Wild & Scenic River Stewardship Council