Appalachian Trail: Route 26 to Carlo Col Shelter
Appalachian Trail: Route 26 to Carlo Col Shelter
2.7
(15)
69
hikers
07:52
20.2km
1,610m
Hiking
This difficult 12.6-mile Appalachian Trail section from Route 26 to Carlo Col Shelter features rugged terrain and panoramic Mahoosuc Range v
Last updated: February 26, 2026
Tips
Your route passes through a protected area
Please check local regulations for:
Waypoints
Start point
Parking
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6.53 km
Highlight • Lake
Tip by
10.9 km
Mahoosuc Notch
Mountain Pass
12.4 km
Highlight • Summit
14.5 km
Highlight • Summit
18.8 km
Mount Carlo
Peak
19.3 km
Carlo Col
Peak
20.2 km
End point
Way Types & Surfaces
Way Types
20.2 km
< 100 m
< 100 m
Surfaces
20.2 km
< 100 m
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Elevation
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Weather
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Today
Sunday 31 May
16°C
2°C
88 %
Additional weather tips
Max wind speed: 17.0 km/h
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This route was planned by komoot.
This section of the Appalachian Trail is considered extremely difficult, even by AT standards. It traverses the rugged Mahoosuc Range, known for significant elevation changes, rock scrambles, and technical features. Hikers should expect steep climbs and descents, often requiring hand-over-foot movement over rocky terrain. Good fitness and sure-footedness are essential.
Despite the strenuous nature, the scenery is a major draw. The trail often follows open ridges with sparse tree cover, providing panoramic views of the surrounding Mahoosuc Range. You'll pass by Speck Pond and traverse summits like South Peak and North Peak, offering spectacular vistas, potentially including the distant Presidential Range on clear days.
Parking for this section of the Appalachian Trail is typically available near Route 26, which serves as a common access point for hikers entering Grafton Notch State Park. Specific parking areas are usually well-marked for AT access.
No specific permits are generally required for hiking this section of the Appalachian Trail. As it passes through Grafton Notch State Park, there are no entrance fees for day use. However, if you plan to stay overnight at shelters like Carlo Col Shelter, standard AT etiquette and regulations apply.
The best time to hike this section is typically from late spring to early fall (roughly May through October). During these months, the weather is generally more favorable, and the trail is free of snow and ice. Be prepared for potential mud and rapidly changing weather conditions, even in summer. Winter hiking is extremely challenging and only recommended for experienced, well-equipped individuals.
Yes, dogs are generally allowed on the Appalachian Trail, including this section. However, due to the extremely rugged and technical terrain, including rock scrambles and areas with ladders/rebar, it may be very difficult or even unsafe for some dogs. Always keep your dog on a leash and ensure they are physically capable of handling the strenuous conditions.
This section is renowned for its extreme difficulty, primarily due to its location within the Mahoosuc Range. It features significant elevation changes, extensive rock scrambling, and technical aids like rebar steps and wooden ladders on steep rock faces. It's also in close proximity to Mahoosuc Notch, famously dubbed "the most difficult mile of the AT," which involves bouldering, rock climbing, and caving.
Carlo Col Shelter is a basic, three-sided lean-to shelter commonly found along the Appalachian Trail. It provides a covered space for hikers to rest or sleep, typically with a wooden sleeping platform. There is usually a privy (outhouse) nearby and often a water source, though water availability can vary and should always be filtered or treated.
Yes, this section of the Appalachian Trail intersects with other paths. You'll find that the route also passes through sections of the Old Speck Trail and the Grafton Loop Trail, offering potential options for longer loops or alternative routes if you're exploring the wider Grafton Notch area.
Due to the extreme difficulty, it's crucial to be well-prepared. Plan for a significantly slower pace than usual; covering even a few miles can take many hours. Ensure you have excellent physical fitness, strong ankles, and sure-footedness. Carry plenty of water, high-energy snacks, and essential gear for variable weather. Consider hiking with a partner, and be prepared for potential overnight stays if you underestimate the time needed.
No, this section of the Appalachian Trail is not suitable for families with young children or beginner hikers. Its classification as "difficult" is an understatement; the terrain is extremely rugged, technical, and requires significant physical exertion and experience. There are many other beautiful, more accessible trails in Grafton Notch State Park that would be better suited for families and beginners.