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Trail conditions are for informational purposes only. Hiking involves inherent risks. Always verify conditions with official sources and use your own judgment. Use at your own risk.

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  1. Peaks
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  3. South Twin Mountain

South Twin Mountain

#8 of 48Difficult

4,902 ft | Twin | 2 routes

New Hike
33°F / Feels 24°F
10 mph N
ConditionsDifficult

Today's Conditions

Updated May 31, 1:05 AM

Current Weather

33°F

Feels like 24°F

Partly cloudy
10 mph N · Gusts 19 mph
67% humidity

Recent Precipitation

Rain: 0.22" (24h) · 1.47" (48h)

Elevation Forecast

Today
Summit 4,902'
29°/37°F43mphWC 11°☀️
4,100'
30°/41°F38mphWC 13°☀️
3,300'
32°/46°F28mphWC 18°☀️
2,500'
34°/49°F19mphWC 23°☀️
Trailhead
36°/51°F16mphWC 26°☀️

~4°F drop per 1,000ft

AI Trail Conditions

Difficult

South Twin Mountain is showing DIFFICULT conditions

See exactly why with full AI conditions — hazard alerts, gear recommendations, and the best hiking window.

See Full Conditions

Best Hiking Window

Saturday evening into Saturday night offers the best short-term window as snow showers taper and high pressure begins to build, allowing for clearing. Sunday morning may be briefly passable early before the secondary low arrives Sunday afternoon — but Sunday afternoon through Sunday night should be avoided entirely due to severe mixed precipitation, lightning risk, and freezing rain.

9 hazards identified
10 gear recommendations
Unlock Full Conditions

Recent Trail Reports

10
View all on NETC
May. 19, 2026by Silent Running

Trail: Lincoln Woods Trail, Osseo Trail, Franconia Ridge Trail, Garfield Ridge Trail, Frost Trail, Twinway, Bondcliff Trail, West Bond Spur

Conditions: Dry Trail, Wet Trail, Wet/Slippery Rock, Standing/Running Water on Trail, Mud - Minor/Avoidable, Mud - Significant, Snow/Ice - Monorail (Unstable), Snow/Ice - Small Patches

“Awesome pemi this morning-started at 2:45 to minimize heat, bugs, and potential afternoon thunderstorms. Saw fewer than twenty hikers all day (no other trail runners), and had every summit minus Liberty to myself! Strong winds and big old clouds kept it comfortable until the eight mile run down from Bondcliff, which felt like I was running through hell it was so dang hot with minimal leaf coverage in the hardwoods. Leave the spikes at home! There was one stretch of stubborn unavoidable snow just before breaking treeline on Guyot. It only lasted five minutes. It was reported that the Zealand-Guyot stretch is still deep and nasty as of this morning. Top of Garfield and West Bond essentially all melted out. Get it before the LW closure!!!”

May. 17, 2026by Sgt. Pepper AKA Professor...

Trail: Gale River Trail, Garfield Ridge Trail, Frost Trail, Twinway, North Twin Spur, North Twin Trail, Haystack Road, FR 22

Conditions: Dry Trail, Wet Trail, Standing/Running Water on Trail, Mud - Minor/Avoidable, Snow/Ice - Small Patches

“The Gale River Trail is in decent shape, standing water on the trail for a few hundred feet down low, with muddy sections here and there. Garfield Ridge Trail, Frost Trail, and Twinway are a little slippery in spots at the moment, with some mud, but overall not too bad 48 hours after a heavy rainfall. North Twin Spur had some easily avoidable monorail, which should be gone by next weekend. There were a few sections of standing water on the trail, and the trail is very scratchy for the first 0.25 miles descending from South Twin. North Twin Trail has a few muddy sections and a couple of spots with running water on the trail. The trail is becoming severely eroded about halfway down to just above the water crossing. From Little River to the trailhead is in nice shape. Haystack Road is looking good and should open soon. FR 22 - Corridor 11 snowmo trail, which connects Haystack Road to the uppermost dead end of Gale River Road, was 75% dry and 25% muddy. It's a very pleasant route to make a loop if you don't want to back track. Fair warning, it does contain a 450' PUD. Beautiful day out, summer temps with a nice breeze on South Twin. The dog had a blast getting extremely muddy!”

May. 16, 2026by Regan
Light Traction

Trail: Zealand Trail, Zeacliff Trail, Twinway, Zealand Spur

Conditions: Wet Trail, Wet/Slippery Rock, Mud - Significant, Snow/Ice - Monorail (Unstable), Snow/Ice - Postholes, Slush

“Trail was incredibly wet and muddy, especially before 4000 ft, multiple streams overflowed onto trail creating a wetter mess. Zealand to Guyot had slushy, postholing, slippery ice that I am unsure any traction would help much with (I did put on spikes at one point but I don't think it helped much) after guyot heading to south twin for about 0.2 miles there was significant snow still - postholing and not a real stable monorail with no work arounds (almost turned back at this point) but after it was a mix of slushy snow and wet muddy trail - it is possible to go around it at points but it did slow down my journey. would recommend poles and gators unfortunately (parts of winter still holding on). The monorail above 4000 ft is unstable and at points I had to straddle as it is still very high - hadto walk in other people's postholes for stability”

Trailblazer Feature

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Conditions synthesized from: NWS Higher Summits Forecast, NOAA Open-Meteo, Mount Washington Observatory, NETC Trip Reports, NOHRSC Snow Depth, Mt. Washington Avalanche Center, USGS Stream Levels, OpenWeather Air Quality.

AI-generated from public data. Always verify conditions before heading out — backcountry weather can change quickly.

Get condition updates for South Twin Mountain

Routes

Pemi Loop

Very Difficult
31.7 mi
9,215 ft
16-25 hours

Twins and Galehead

Difficult
11.5 mi
3,884 ft
6-10 hours
Community

Trail Map

About South Twin Mountain

Part of the Twins Range with excellent views. Galehead Hut is nearby. Often combined with North Twin and Galehead.

Elevation

4,902 ft

Range

Twin

Rank

#8 of 48

Difficulty

Difficult

Coordinates

44.1876, -71.5548

Nearby Peaks

Galehead Mountain

Moderate

4,024 ft · Twin

0.9 mi away

North Twin Mountain

Difficult

4,761 ft · Twin

1.1 mi away

Mount Zealand

Moderate

4,260 ft · Zealand

1.7 mi away

West Bond

Very Difficult

4,540 ft · Bond

2.3 mi away

Mount Bond

Very Difficult

4,698 ft · Bond

2.7 mi away

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Trip Reports

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