Scouts should pack a day-pack with the Cub Scout Six Essentials for Going Outdoors:

Callahan State Park is a 820-acre state-owned, public recreation area located in the town of Framingham and the city of Marlborough, Massachusetts.  Callahan has seven miles of marked trails and is used for activities including fishing, hiking, horseback riding (horses not provided) and cross-country skiing. Within the park are nearly 100 acres of open fields.  A trail map can be found here.

The park is home to a wide variety of trees both coniferous and deciduous. Wildlife spotted at Callahan State Park include snapping turtles, spotted turtles, red bellied turtles, white tail deer, garter and water snakes, tree frogs, most New England frog and toad varieties, minks, fisher cat, red fox, coyote, largemouth bass at Eagle Pond, various common trout, pumpkin seeds and blue gills, herons, egrets, bobolinks, goldfinches, orioles, red tail hawks, mocking birds, sparrows, swifts, swallows, grackles, cow birds, cat birds, barred owl, other various birds of prey, robins, cardinals, blue jays and other New England birds. Deer flies, ticks, and mosquitoes are common. Garter snakes can be seen basking on the hot dirt paths in spring and summer.