Following the arrival of Europeans in the early 17th century, the population of the Massachusett fell by as much as 90% due to epidemics.

[4] In the 1690s, Thomas Sawin, who lived in a house in nearby Sherborn, was invited by the Natick Indians to build a gristmill and dam on the stream that is now called Indian Brook, creating the Broadmoor Mill Pond.

[5] Broadmoor's 9 miles of trail pass through woodlands, marshland, ponds, and a glacial drumlin, and along the banks of the Charles River.

[1] The sanctuary's wetlands feature wood ducks, painted turtles, great blue herons, and river otters.

[1] Environmental improvements included adding solar collectors on the roof, composting toilets, and rainwater storage.

Broadmoor programs include bird-watching, lectures, canoe trips, hiking, and a children's summer camp.