Caledonia State Park
🏆 Where the Appalachian Trail Meets Civil War History — 1,125 acres in the South Mountain corridor with a section of the AT, swimming pool with waterslide, 175 campsites, trout-stocked Conococheague Creek, and the ruins of Thaddeus Stevens’ iron furnace burned by Confederates in 1863
Why Caledonia Is Pennsylvania’s Most Historic Trail Park
Caledonia State Park sits at a remarkable intersection of American history and Appalachian wilderness. Located where Adams County meets Franklin County on South Mountain, this 1,125-acre park contains a section of the Appalachian Trail, the ruins of an iron furnace destroyed by Confederate troops during the Gettysburg Campaign, and one of the most beloved swimming pools in Pennsylvania’s state park system. It is a place where you can hike the AT in the morning, study Civil War history in the afternoon, and catch trout in the Conococheague Creek at sunset.
Civil War History: Thaddeus Stevens and the Burning Furnace
The park’s most historically significant feature is the Caledonia Iron Furnace, built and operated by Thaddeus Stevens beginning in 1837. Stevens was no ordinary ironmaster — he was a fierce abolitionist, a Radical Republican Congressman, and one of the most powerful voices against slavery in American politics. In June 1863, as Confederate General Jubal Early’s forces marched toward Gettysburg, Early ordered the furnace burned to the ground as direct retaliation against Stevens’ anti-slavery stance.
The ruins of the furnace remain in the park and are interpreted with historical markers. Stevens went on to lead the Reconstruction efforts after the Civil War, and his legacy as “The Great Commoner” is preserved here where his industrial ambitions and political convictions literally collided with the Confederate army.
Hiking and the Appalachian Trail
| Trail | Distance | Difficulty | Highlights |
|---|---|---|---|
| Appalachian Trail | Through-hike section | Moderate | The AT crosses through the park; white blazes through forest |
| Charcoal Hearth Trail | 2.0 mi loop | Easy | Historic charcoal production sites; family-friendly |
| Three Valley Loop | 3.5 mi | Moderate | Creek crossings; valley views; wildflowers |
| Ramble Trail | 1.0 mi | Easy | Nature walk; interpretive signs; creek access |
Swimming Pool and Creek Activities
Caledonia’s ADA-accessible swimming pool with waterslide is one of the most popular features in the entire Pennsylvania state park system. Open from Memorial Day through Labor Day, the pool charges a small fee and features a snack bar. The East Branch Conococheague Creek, which flows through the park, is stocked with trout by the Pennsylvania Fish and Boat Commission and provides excellent fly fishing and spin casting opportunities.
Camping
| Campground | Sites | Amenities | Best For |
|---|---|---|---|
| Chinquapin Hill | 80+ sites | Some electric; modern bathhouse; shaded | RV and tent; close to pool |
| Hosack Run | 90+ sites | Some full hookup; bathhouse | Larger RVs; creek access |
| All Sites | 175 total | Tables, fire rings, flush toilets, hot showers | Reservations recommended |
Best Time to Visit
| Season | Weather | Crowds | Best For |
|---|---|---|---|
| Fall (Sep-Oct) | 50-68°F | High | Spectacular foliage on South Mountain; AT hiking; trout |
| Summer (Jun-Aug) | 75-85°F | High | Swimming pool; camping; creek wading; Gettysburg visits |
| Spring (Apr-May) | 50-70°F | Moderate | Trout stocking; wildflowers; AT thru-hikers passing |
| Winter (Dec-Feb) | 25-40°F | Very Low | Cross-country skiing; cabin rentals; solitude |
🥾 Hike the AT, Explore the Civil War
Walk the Appalachian Trail, study the ruins of a furnace burned by Confederate soldiers, and swim in one of Pennsylvania’s finest state park pools.
Frequently Asked Questions
Can I hike the Appalachian Trail from Caledonia?
Yes. The Appalachian Trail passes directly through Caledonia State Park, making it an excellent access point for day hikes or section hikes along the AT. The trail is marked with white blazes and connects to the broader 2,190-mile trail system running from Georgia to Maine.
Is the swimming pool free?
No. The swimming pool charges a small admission fee (typically $4-8 per person). The pool is ADA-accessible, features a waterslide and snack bar, and is open from Memorial Day weekend through Labor Day. It fills up on hot weekends, so arrive early.
How close is Gettysburg?
Gettysburg National Military Park is approximately 10 miles east of Caledonia State Park, making it easy to combine a camping trip at Caledonia with battlefield tours. Many visitors use Caledonia as a base camp for exploring the Gettysburg area while enjoying the park’s trails and pool.
