What are the main hiking routes to South Twin Mountain?

The main routes to South Twin Mountain include North Twin Trail via North Twin - out & back., Gale River Trail to Twinway - via Galehead Hut..

How difficult is hiking South Twin Mountain?

South Twin Mountain is rated Difficult difficulty.

How long does it take to hike South Twin Mountain?

Typically, hiking South Twin Mountain takes 7–9 hours - out-and-back over North Twin..

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South Twin Mountain

Steep, rocky final climb; lower trails gradual with typical roots and rocks

Prominence: 1522 ft Range: Twin Range

Units

Elevation: 4,902 ft

South Twin Mountain - This landscape photography showcases South Twin Mountain framed by leafy branches in the foreground, with a mix of sunlit and shadowed forest trails stretching across the White Mountains. The afternoon light emphasizes the varied greens of the summer season, while fluffy clouds drift above the mountain ridge line in New Hampshire's White Mountain National Forest. - NH48 — This landscape photography showcases South Twin Mountain framed by leafy branches in the foreground, with a mix of sunlit and shadowed forest trails stretching across the White Mountains. The afternoon light emphasizes the varied greens of the summer season, while fluffy clouds drift above the mountain ridge line in New Hampshire's White Mountain National Forest.

Overview

Steep, rocky final climb; lower trails gradual with typical roots and rocks

Standard Routes

North Twin Trail via North Twin - out & back. — 11.2 mi • 3,700 ft gain • Out & back - over North Twin. • Difficult
Gale River Trail to Twinway - via Galehead Hut. — 13.0 mi • 3,300 ft gain • Out & back - or car spot loop via North Twin Trail. • Difficult

Monthly Weather Averages

Climate context

Monthly climatology baseline near this summit elevation.

Related Trails & Routes

Parking & Access

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Difficulty Metrics

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Risk & Preparation

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Wilderness Safety

Data TBD for this route.

Trail & Terrain

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Conditions & Access

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Photo gallery

South Twin Mountain - This landscape photo captures South Twin Mountain during a calm summer morning in the White Mountains of New Hampshire. The scene showcases the mountain's dense greenery and rocky features, illuminated by soft natural light that emphasizes the textures of the alpine zone. The image reflects the pristine environment of White Mountain National Forest, ideal for hiking and mountain weather observation. - NH48 — Morning Light on South Twin Mountain Ridge
`Canon EOS 5DS R | 35mm F1.4 DG HSM | Art 012 | f/5.6 | 0/1 sec | ISO 100`

South Twin Mountain - This late afternoon winter scene features South Twin Mountain in the White Mountains of New Hampshire, with sunlight casting soft shadows across the snow-laden forest and ridge line. The pristine conditions reveal detailed textures of the mountain weather and forest trail, ideal for landscape photography and hiking enthusiasts exploring White Mountain National Forest. - NH48 — Winter Serenity on South Twin Mountain
`Canon EOS 5DS R | EF24-70mm f/4L IS USM | f/13.0 | 1/250 sec | ISO 200`

Trail-tested notes

Experience summary

I built this guide around field photography sessions on South Twin Mountain in Twin Range. South Twin Mountain is a 4,902-foot mountain located in Grafton County, New Hampshire.

Conditions from experience

Summer, early fall - Zealand Road access for some approaches in season. Medium - summit exposed but not a long above-treeline stretch.

Planning tip

North Twin Trail via North Twin - out & back. - 11.2 - 3,700 - Difficult - Out & back - over North Twin. Yes - river crossings on North Twin Trail; Galehead Hut nearby has water. Trailhead on Haystack Rd - closed in winter.; alternative winter start at end of Little River Road adds mileage

Last reviewed: 2026-02-14