Great website! Lot of information, but some of it is incomplete. It is true that, "Non-motorized boats are allowed on this large backup reservoir. Boat Launch area is located on Woodland Rd, next to the Stone Zoo." But, as a reservoir the state has to be very carefully not to introduce any of the many invasive plants and animals. The only boats allowed on Spot Pond are rentals from Spot Boat Boating www.outdoorrec.com/spot-pond.html. Spot Pond Boat is located about 1/2 mile south of the Stone Zoo between the Botume House Visitor Center a 4 Woodland Road and the Spot Pond Pump station (with a tall brick smoke stack).
Unlike the Blue Hills you don't have to have a car to get to the Middlesex Fells. Take an Orange Line train to the Oak Grove stop and get off on the Washington Street (east) side. Walk north (away from Boston) up Washington Street. Bear left at the "Y" intersection where Pleasant Street goes left. Just after the intersection turn right up Goodyear Avenue. Goodyear Avenue ends at the Gate-58 entrance to the Fells. There are over 50 miles of trails and fire roads in the 2500 acre Fells. It is easy to get a little lost. Trail maps are for sale at many locations in the Boston area. There's list at www.fells.org.
Thanks! I added a link for the boat rentals and Orange Line info on the page.