Overview
The Ice Age National Scenic Trail is a 1,200-mile path through Wisconsin that traces the edge of the last continental glacier's advance 12,000 years ago. It is a distinctly Midwestern hike rather than remote western wilderness: roughly 700 miles of yellow-blazed forest trail connected by 500 miles of quiet country road walks. The route threads through 60 small towns where trail angels shuttle hikers, cook meals, and put people up in guest rooms or backyard RVs, which has earned it a reputation as America's friendliest thru-hike. Terrain runs from remote stretches in the Chequamegon-Nicolet National Forest to popular segments in Kettle Moraine State Forest, past glacial lakes, kettles, eskers, and drumlin fields. It suits backpackers who want a less technical trail with strong community support and who don't mind long stretches of road walking. The western terminus is at Interstate State Park in St. Croix Falls; the eastern terminus is at Potawatomi State Park near Sturgeon Bay on Lake Michigan.
Permits & Regulations
No permits are required for most of the trail. Dispersed camping areas (DCAs) are free and first-come, first-served, and exist specifically for long-distance hikers (not for single-night out-and-back trips). These areas allow one night only, with no campfires. Primitive camping is allowed in northern Wisconsin (north of Langlade County) on county and national forest lands, though some county forests require permits. In the Chequamegon-Nicolet National Forest, camp at least 150 feet from trails and roads or 200 feet from water.
The popular Adirondack-style backpack shelters in Kettle Moraine State Forest's Northern and Southern Units require reservations ($15 Wisconsin residents, $20 non-residents) through the Wisconsin DNR reservation system at 1-888-947-2757. Each shelter holds up to 10 people and is limited to one night per site. A Wisconsin State Park vehicle sticker is required when parking at state forest trailheads.
South of Langlade County, no primitive camping is allowed. Plan to use DCAs, reserved shelters, or stay in towns.
Best Season
Fall (mid-September through October) is ideal: cool temperatures, no bugs, and autumn colors that peak in mid-October. Early September can still hit the 90s°F, and November brings unpredictable weather with possible snow and near-freezing temperatures.
Spring (April-May) has moderate weather and wildflowers, but also muddy trails and peak tick season (worst April-July). Wear long pants and sleeves, check for ticks daily, and use permethrin-treated clothing.
Summer means temperatures in the 80s-90s°F with high humidity, plus mosquitoes and black flies at their worst; a bug net is essential. Water is plentiful, but you'll be miserable.
Winter thru-hiking is possible for experienced cold-weather backpackers. There are no ticks or mosquitoes, the ground freezes hard instead of turning to mud, and the bare forest opens up the views. Expect single-digit or below-zero Fahrenheit temperatures. Emily Ford became the first woman to complete a winter thru-hike, documenting the unique challenges.
Water & Resupply
Water is generally abundant from Wisconsin's glacial lakes, streams, and rivers, though all natural sources require filtration. Water is available at most trailheads and campgrounds. Carry a reliable filter; you'll use it heavily in the remote northwestern sections, less so in the south and northeast where towns come frequently. Water availability was never an issue for documented thru-hikers.
Resupply is straightforward, with towns spaced 3-5 days apart in the eastern and central sections. Two stretches in the remote west run long: approximately 85 miles between Haugen and Weyerhaeuser through Rusk County forest, and 110 miles between Rib Lake and Summit Lake. Most trail towns have grocery stores and restaurants. Local post offices accept mail drops, though buying in town is usually easier.
Key resupply towns include St. Croix Falls (western terminus, full services), Portage (central Wisconsin, grocery stores, outdoor shops), and Cross Plains (home of Ice Age Trail Alliance headquarters). The trail passes through 60 towns total. Contact the Ice Age Trail Alliance at (800) 227-0046 for their comprehensive 20-page trail angel list and unofficial resources covering town services, resupply info, and camping options.
Hazards & Challenges
The biggest challenge is the 500 miles of road walking on unmarked "connecting routes" between yellow-blazed trail segments, not the terrain. These quiet country roads are completely unblazed, so navigation requires the official Atlas, maps, or GPS apps. Road walks can be monotonous and put you alongside occasional vehicle traffic.
Poison ivy is prevalent, especially in edge habitats where the trail transitions between forest and meadow, around trailheads, and where the canopy opens. Follow "leaves of three, let it be." Walk in the center of the trail, avoid touching overhanging plants, and wear long pants. If exposed, wash immediately with soap and warm water.
Ticks are the primary wildlife concern, especially April-July. Check your entire body daily and use permethrin-treated clothing. Black bears live in the remote northern sections. Carry a bear bag or use bear vaults; bear canisters are not required but recommended. A few hikers report finding bear tracks overlaying their own footprints.
The 120-mile Chequamegon-Nicolet National Forest section is the most rugged and remote, with steep climbs and real potential for disorientation. Other hard segments include Devil's Lake (near-vertical rocky bluffs), Jerry Lake (15.2 miles with 2,472 feet of gain), and Gibraltar near Lodi (sustained climbs).
Total elevation gain is moderate: estimates range from 21,600 to 25,000 feet. Terrain varies from flat prairies to rolling hills, rocky sections, and wetland crossings. The unmarked connecting routes demand attention, so carry the Atlas plus a GPS device or phone with downloaded maps.
Getting There
The western terminus at Interstate State Park in St. Croix Falls is on US Highway 8. The eastern terminus at Potawatomi State Park near Sturgeon Bay is reached via State Highway 42/57. Both have parking areas.
No commercial shuttle services operate specifically for the Ice Age Trail. Most hikers arrange logistics with two-vehicle car shuttles, bicycle shuttles (ride a bike to the endpoint, lock it, drive back to the start), or the extensive trail angel network. The Ice Age Trail Alliance maintains a long list of volunteers willing to provide shuttles, and many will also offer lodging or grocery runs.
Hundreds of trailheads and access points sit along the 1,200-mile route. Parking is free at most Ice Age Trail parking areas unless you're in a state park that requires a vehicle sticker. Developed parking areas are marked on the official Atlas.
Nearest major airports: Minneapolis-St. Paul (MPS) for the western terminus, Milwaukee (MKE) or Green Bay (GRB) for the eastern terminus and central sections. Madison (MSN) serves the southern portions.
Tips
Lean on the trail angel culture; it's what sets the Ice Age Trail apart. Hikers frequently sleep in trail angels' homes, barns, or RVs after meeting them just hours earlier, and angels leave water, food, and supply caches along the trail. The Ice Age Trail Alliance's 20-page trail angel list is invaluable, and volunteers often go far beyond simple shuttles.
Prepare for the 500 miles of road walking, mentally and physically. Pavement pounds feet differently than trail. Some hikers find the connecting routes tedious; others enjoy passing through authentic small Wisconsin towns. Download offline maps and carry the Atlas, because there are no blazes to follow on connecting routes.
The official Ice Age Trail mobile app has real-time information on parking, camping, and water sources. Download it before starting.
Camp selection strategy: in the north (above Langlade County), you can primitive camp 200 feet from trail and water. In central and southern sections, plan around the 22+ dispersed camping areas or reserved shelters. Book Kettle Moraine shelters well in advance; availability is tight on summer weekends.
A typical thru-hike takes 60-75 days. Actual hiking distance varies between 1,100-1,200 miles depending on your choices on the connecting routes and whether you hike both sides of the Devil's Lake bifurcation.
Carry a comprehensive first-aid kit with tick removal tools, poison ivy treatment (Tecnu), and blister care for the road walking. A small bell or bear spray brings peace of mind in the remote northern sections, though bear encounters are rare.
The 23 designated Ice Age Trail Communities offer particularly strong hiker support, with local restaurants, lodging, and services committed to trail awareness. These towns are your best bet for resupply and zeros.
Don't underestimate Wisconsin weather. Shoulder seasons can swing 40°F in a day, so carry rain gear and layers even in summer. Winter attempts require serious cold-weather experience and equipment for potential below-zero temperatures.
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