Bri-Mar Trail The Bri-Mar trail is an approximately 2.6 mile moderately difficult (but family-friendly) out-and-back hikethat ascends Rattlesnake Mountain (1,035 ft). Allow about an hour or two for this adventure, depending upon the abilities of those in your group. The trail features two good viewpoints overlooking the Lakes Region on the way to the summit, withthe best view looking toward Sebago Lake. The trail, named in memory of Brian and Marlene Huntress, is maintained by the Huntress family. Note thatno dogs are allowed on this trail, and the trail is also closed during the month of April.