Carlstrom Memorial Forest, Shrewsbury, Massachusetts Easy hiking trails are available in Carlstrom Memorial Forest, with the most popular option beingthe 1.4-mile Carlstrom Forest Trail, which gains 183 feet of elevation. The longest route, Gulf Trail, State Trail, and Carlstrom’s Loop, spans approximately 1.6 miles. The property consists of two seamlessly connected parcels with 1.9 miles of hilly trailsand offers multiple color-blazed paths (yellow, red, and blue) suited for different preferences. The forest features diverse scenery and historic details worth noting. The Yellow Trail passes through Purple Loosestrife in August, crosses Nick’s Bridge with painted rocks in the creek, and features an early stone culvert likely built when horse and wagon travel was common. The Blue Trail winds through mature Oak, Maple, and Beech forest, while the Red Trail is steep and drops through young white pine-lined terrain. The trails are excellent for birding, hiking, and running, and are open year-round.