I ride in "the valley" alot and you should find the xc ski trails family friendly. If you are looking for some tough classic New England trails check out the Smart's Brook area. The trail head is on rt. 49 just past Sandwich Notch Road. Stop in at Rhino Bike Works in Plymouth and get trail info. The shop ride goes up there sometimes so Eric, Slade or Mike should be able to send you in the right direction there. They can tell you about the other trails in the area as well....