Gibbs Mountain is a small peak located in Marlboro, Massachusetts with an elevation of 499abbr=offNaNabbr=off, named after a local homesteader, Micah Gibbs.[1] The summit is located in Callahan State Park and is traversed by the Red Tail Trail and Bay Circuit Trail, as well as the 3.7 mile Gibbs Mountain Loop Trail.[2] The summit is marked by a small pile of rocks in a small clearing.