North Twin via North Twin Trail

The North Twin via North Twin Trail is 8.5 miles round trip, starting at North Twin Trailhead (Haystack Road). At AMC book time — half the distance in hours plus 30 minutes per 1,000 ft of climbing — that works out to roughly 4-7 hours. Most parties take longer than book time on rough or above-treeline terrain, in winter, or with a heavy pack.

The North Twin via North Twin Trail climbs about 2,848 ft over 8.5 miles — an average of roughly 337 ft of gain per mile. That figure is cumulative ascent across the whole out-and-back, not the difference between the trailhead and the high point.

HikerNerd rates the North Twin via North Twin Trail Moderate, scored with the Shenandoah difficulty formula — √(elevation gain × 2 × distance) — applied to its 8.5 miles and 2,848 ft of gain. The score measures physical effort only. Above-treeline exposure, water crossings, and winter conditions can make a moderate-rated route the hardest day of your year, so check current conditions before committing.

The North Twin via North Twin Trail summits 1 named peak: North Twin Mountain.

The North Twin via North Twin Trail starts at North Twin Trailhead (Haystack Road). Check the trail alerts on this page before you drive — trailhead access and parking in the White Mountains change with closures and construction.