We'll be riding a little over 48 miles, out the Minuteman, through Carlisle and Chelmsford to the Bruce Freeman Rail Trail, south through a corner of Acton to Concord where we'll have lunch, and then back in via the Minuteman. There are a few hills but MapMyRide says nothing steeper than 3%.
We'll be riding slowly -- between 10 and 12 mph -- and taking lots of breaks. We'll probably get back to Somerville between 4 and 5 in the afternoon.
Feel free to join for all or part -- hope to see you then!