Maine · International long-distance trail

International Appalachian Trail

1,900 mi long · in Maine

The International Appalachian Trail extends the Appalachian Trail northward from Mount Katahdin in Maine through New Brunswick, Quebec, and Newfoundland, then continues across the North Atlantic into Greenland, Iceland, the British Isles, and the European Appalachian remnants. Total length depends on which European extensions you count; the New England-Canada section alone is roughly 1,900 miles.

International Appalachian Trail
Photo via Wikimedia Commons (CC BY-SA 4.0).
States
Maine
Length
1,900 mi
Trail type
International long-distance trail
Network
International (iwn)
Centroid coords
46.9534°, -67.7928°
Official site
www.iat-sia.org
OSM relations
1 sub-relations on OpenStreetMap
From Wikipedia: The International Appalachian Trail was originally a hiking trail which ran from Katahdin Woods and Waters National Monument, in Maine, through New Brunswick, to the Gaspé Peninsula of Quebec, after which it followed a ferry route to Newfoundland, and then continued to the northern-easternmost point of the Appalachian Mountains at Belle Isle, Newfoundland and Labrador. As of July 2025, there are widely geographically dispersed IAT-branded walking trails in Greenland, Iceland, Norway, Sweden, Denmark, Scotland, Northern Ireland, Ireland, Isle of Man, Wales, England, Spain, Portugal, and Morocco. Excerpt from the Wikipedia article on International Appalachian Trail, available under CC BY-SA 4.0.

Termini

Start & end

Southern terminus: Mount Katahdin, Maine.

Northern terminus: Crow Head, Newfoundland (and continuing in Europe).

Plan your hike

Practical notes

Maps + permits: long-distance trails like this often require permits for through-hiking, backcountry camping, or specific sections (especially in National Parks). Check with the maintaining organisation listed above and the relevant land manager before booking travel.

Water + supplies: water sources vary seasonally on most U.S. trails. Carry a filter and consult current trail-condition reports — through-hiker journals (PCT-L, AT Reddit, etc.) and the maintaining organisation publish regular updates.

When to go: hiking seasons vary widely with elevation, latitude, and snowpack. Through-hikers traditionally start the AT in March-April (Springer northbound) and the PCT in late April (Campo northbound). High-elevation western trails (CDT, JMT, Wonderland) generally aren't passable until July.

If you've hiked International Appalachian Trail and have current notes (water sources, trail closures, permit changes), tell us at /contact — we update pages as we learn.

Sources

Public data + curation

Trail data on this page is compiled from OpenStreetMap contributors (ODbL), the maintaining organisation's public-facing materials, and Wikipedia (CC BY-SA where excerpts are quoted). Distance, terminus, and descriptive text for nationally-designated trails are hand-curated from federal land-manager websites and trail-association sources. We do not modify the underlying data; this page presents what is already publicly recorded. To suggest corrections, see our methodology page.