We got on the tandem again for 24.25 miles. Concord, Lincoln, Weston, Weyland, Sudbury, back through Lincoln to Concord. Temps in the upper 30's. Not as windy as yesterday but at one point crossing open farmland we had trouble maintain speed in a 42/28 gear combination on a flat road.

One lovely thing about biking is you discover things you'd never see in a car. Today we found this historical site in Sudbury, the remains of a garrison against an uprising by Native Americans against the settlers. The site marker says this was the site of a successful defense against a 3-day siege by King Phillip, April 1676. Lovely cedar trees too.