The Adventure Hiking Trail (AHT) is Indiana's premier backpacking destination—a rugged 24-25 mile loop traversing the forested ridges and river bluffs of Harrison-Crawford State Forest and O'Bannon Woods State Park in southern Indiana. This challenging trail delivers dramatic Ohio River overlooks, deep hardwood ravines, limestone cliff formations, sinkholes, and remnants of pioneer homesteads. Designated as a National Recreation Trail, the AHT appeals to backpackers seeking a physically demanding weekend trip with solitude and scenic diversity. The trail's steep, unrelenting climbs and descents—often straight shots up and down ridgelines that have eroded into stream beds—demand solid fitness and careful footing. Most backpackers complete the loop in 2.5-3 days, though ultralight hikers have pushed it in under 24 hours.
No advance permit or reservation is required for backpacking the Adventure Hiking Trail. However, both O'Bannon Woods State Park and Harrison-Crawford State Forest charge entrance fees: $7/day for Indiana residents and $9/day for out-of-state visitors. Registration is not required at Harrison-Crawford State Forest (unlike Morgan-Monroe and Yellowwood state forests).
Camping is permitted only along the Adventure Hiking Trail—nowhere else in these properties. Stays are limited to 14 consecutive days with a maximum group size of 6 persons per campsite. Four shelters along the route are first-come, first-served and available only to AHT backpackers. Dispersed primitive camping is allowed in Harrison-Crawford State Forest sections but not within O'Bannon Woods State Park boundaries.
Campfires must be built in pits no larger than 12 inches in diameter with a 3-foot cleared radius down to mineral soil. Check Indiana's statewide burn ban map before your trip, as Harrison and Crawford counties may impose seasonal fire restrictions. Pack out all trash—Leave No Trace principles apply.
The optimal hiking windows are March through May and September through October. Spring (late April–May) offers wildflower blooms, comfortable temperatures in the 50s-70s°F, and flowing creeks—though mud is common and recent rainfall increases the already minimal water sources slightly. Fall (September–October) delivers crisp air, spectacular foliage, fewer bugs, and the most reliable weather, with temperatures ranging from the 40s-70s°F.
Summer (June–August) is hikeable but hot, humid, and buggy. Expect temperatures in the 75-90°F range, high humidity, ticks, mosquitoes at dawn/dusk, and completely dry water sources. Winter hiking is possible and popular with experienced backpackers—the trail is described as "most runnable from late fall through late spring." Wind and ice storms can drop trees across the trail any time of year, but winter offers solitude and long ridge views without foliage. Be prepared for freezing temperatures, possible snow/ice, and challenging footing on steep slopes.
Water is the AHT's biggest challenge. There are little to no reliable natural water sources along the trail, even after heavy rain. Hikers report streams bone-dry in summer, with only occasional stagnant pools. Trip reports consistently emphasize: cache water at road crossings or carry everything you need.
The trail crosses roads five times, providing convenient water cache opportunities:
- Highway 462
- Old Forest Road
- Cold Friday Road (highly recommended cache spot)
- Highway 62 (near old iron bridge)
- Near Pioneer Cabin Shelter
Many backpackers stash gallon jugs at multiple crossings before starting. Plan for at least 3-4 liters per person per day depending on season and exertion level. No resupply towns are accessible mid-trail. Corydon (nearest town, 10-15 minutes by car) has grocery stores and gas stations, but you'll need a vehicle to access them from trailheads.
The AHT's steep terrain is its defining feature and primary hazard. Ascents and descents are relentlessly straight up and down, creating eroded gullies filled with loose gravel, mud, and leaves—secure footing is difficult. Expect to use hands on steep sections. Fallen trees and logs may block the trail at any time due to minimal maintenance.
Ticks are prevalent from spring through fall. Treat clothing with permethrin and check yourself thoroughly each day. Poison ivy grows along the forest floor and up tree trunks. Mosquitoes swarm at dawn and dusk during warm months.
Navigation requires attention. The trail is marked with white and green blazes, but markers can be difficult to locate where trees have fallen or in recently logged areas. One common mistake: missing a 90-degree turn between Highway 462 and Old Forest Road. The AHT intersects multiple horse trails—stay alert or you'll accidentally follow the wrong path. Download offline maps before starting.
No significant creek crossings, river fording, or lightning exposure compared to alpine trails, but the rugged, remote terrain and limited water make self-sufficiency essential. Cell service is spotty to nonexistent.
The Adventure Hiking Trail is located near Corydon, Indiana, approximately 25 miles (30 minutes) northwest of Louisville, Kentucky. Louisville International Airport (SDF) is the nearest major airport, 35 miles from Corydon with direct flights from most US hubs.
From Louisville, take I-64 West into Indiana, then follow signs toward Corydon and the state forest. The loop has multiple access points along Highway 462, Old Forest Road, and Highway 62. No high-clearance vehicle is required—standard forest roads are passable in dry conditions, though mud can be challenging after rain.
No public transit or shuttle services operate to the trailheads. Parking is available at O'Bannon Woods State Park (entrance fee required) and various forest road intersections. For loop logistics, most backpackers park at one trailhead and return to the same spot after 2-3 days.
Start early on Day 1 to reach your first shelter or camping spot with daylight to spare—navigation in dense forest becomes difficult at dusk. The southern section along the Ohio River features the most dramatic scenery, so plan your itinerary to hit those bluffs in good light.
Shelter strategy: The four shelters (including Ohio River Shelter, Old Barn Shelter, and Pioneer Shelter) are first-come, first-served. Arrive by mid-afternoon to claim a spot, especially on weekends. Shelters provide only a roof—bring a sleeping pad and be prepared to tent camp if they're full.
Cache water logistics: Drive the loop beforehand if possible, stashing water at 2-3 road crossings. Cold Friday Road is the most popular cache location. Use opaque containers and hide them off-road to avoid theft.
Gear considerations: Trekking poles are highly recommended for steep descents. Ankle-high boots provide better support than trail runners on loose, rocky slopes. Pack permethrin-treated clothing and bug repellent for spring/summer trips. A water filter is useful only if you're willing to gamble on finding water—don't rely on it.
Avoid holiday weekends (Memorial Day, Fourth of July, Labor Day) when shelters fill quickly and the trail sees higher traffic. For solitude and the best conditions, target weekdays in late April or early October.
The trail is well-marked overall, but download the official Indiana DNR map PDF and bring a compass or GPS device. The figure-eight configuration around Indian Lake and Lake Celina allows for shorter 12-15 mile loops if you want to test the terrain before committing to the full 25 miles.
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