Boston: Mt. Monadnock Loop

Hike 4.6 miles up the quieter, less-traveled west side on one of the mountain's oldest trails, alternating between forested scrambles, old streambeds, and exposed rock ledges.

Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members! Download the app.

Trail Facts

  • Distance: 5.8



Location: 42.8595008850098, -72.1392135620117

Head NE onto Marlborough Trail marked by white M blazes


Location: 42.8616828918457, -72.1228179931641

Rise above treeline to first of many rock ledges (slick when wet); great views of summit and forested countryside of S. New Hampshire; continue following white Ms


Location: 42.861515045166, -72.1225204467774

Continue straight @ junction on Marlborough Trail, eventually bearing R and following trail marked D/M (Dublin/Marlborough) to summit


Location: 42.8523178100586, -72.1130828857422

R onto Monte Rosa Trail; cross small seasonal stream


Location: 42.8561515808106, -72.1135482788086

Continue straight at junction on Monte Rosa Trail, following cairns; bear L downhill, trail turns into Great Pasture Trail in 150 ft.


Location: 42.8567848205566, -72.1170806884766

Great Pasture Trail ends @ Marian and Mossy Trails; go R on Marian


Location: 42.8606338500977, -72.1181182861328

Cross stream (good water supply)


Location: 42.8629493713379, -72.1194000244141

L at T onto Marlborough Trail; retrace route 1 mile back to parking lot


Location: 42.8613967895508, -72.1084136962891

Monadnock?s rocky summit; views of Mt. Washington to NE and Mt. Wachusett to SE on a clear day; retrace D/M trail 100 feet, go L onto White Arrow Trail


Location: 42.8581314086914, -72.108283996582

Descend into woods, bearing SW