Mount Isolation, at 4,004 feet, earns its name. The northernmost high point of Montalban Ridge, it sits within the Presidential Range-Dry River Wilderness roughly seven miles by trail from the nearest road, making it one of the most remote summits on the NH 4,000-footers list. From the open summit, northward views across the Southern Presidentials to Mount Washington are broad and unobstructed, though tree cover partially frames the outlook to the south.
Three main approaches reach the peak. The eastern route via Rocky Branch Trail follows a forested valley to the Isolation Trail, covering roughly 7 miles one way with about 3,050 feet of gain; trail sections run persistently wet and muddy, and stream crossings can surge after heavy rain. A tent site at the Rocky Branch/Isolation Trail junction makes an overnight trip practical. From the west, the Glen Boulder Trail ascends steeply from Pinkham Notch to meet the Davis Path above treeline, which turns south along the ridge to the summit, gaining close to 4,000 feet total. A southern approach following the full Davis Path covers more than 9 miles one way at a gentler gradient.
Snow can linger on northern slopes into May, and the summit has little wind shelter. The long approaches from any direction make conditions at elevation worth checking carefully before departure.
