23
riders
3
rides
Road cycling around Tunnel Hill offers routes primarily developed on former railroad beds, providing largely crushed gravel surfaces with gentle grades. The terrain transitions from agricultural fields and reclaimed strip mines in the north to wooded bluffs and sections of the Shawnee National Forest. Further south, the landscape features bottomland woods, ponds, streams, and wetlands, including parts of the Cache River State Natural Area. Unique features include a 543-foot tunnel and 23 trestles that offer views over bluffs and creeks.
โฆLast updated: June 29, 2026
3
riders
110km
05:18
780m
780m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
4
riders
93.9km
04:58
620m
620m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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2
riders
56.1km
02:52
460m
460m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
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There are 8 road cycling routes available around Tunnel Hill, all of which are rated as moderate in difficulty. These routes primarily utilize former railroad beds, offering a unique cycling experience.
The terrain for road cycling around Tunnel Hill is diverse, primarily featuring former railroad beds with largely crushed gravel surfaces and gentle grades. You'll encounter rolling agricultural fields, reclaimed strip mines, wooded bluffs, and sections of the Shawnee National Forest. Further south, the landscape transitions to bottomland woods, ponds, streams, and wetlands, including parts of the Cache River State Natural Area.
The Tunnel Hill State Trail, which forms the backbone of many routes, is a multi-use trail with gentle grades, making it suitable for families. While all listed komoot road cycling routes are moderate, the overall trail's characteristics are generally family-friendly. The smooth, well-maintained surface and varied scenery provide an enjoyable experience for different skill levels.
The Tunnel Hill State Trail is a multi-use trail, and generally, multi-use trails in state parks allow leashed dogs. However, it's always best to check specific regulations for any particular section or protected area like the Cache River State Natural Area to ensure compliance.
Cyclists can experience a variety of unique features. The trail's namesake, a 543-foot long tunnel near the town of Tunnel Hill, is a highlight. You'll also cross 23 picturesque trestles, some offering breathtaking views over bluffs and creeks, such as the 90-foot tall Breeden Trestle. The southern section passes through ancient cypress-tupelo swamps in the Cache River State Natural Area, home to diverse wildlife.
The Tunnel Hill State Trail connects multiple towns such as Harrisburg, Vienna, and Karnak, which offer access to amenities including parking. Vienna, known as the 'Bicycling Capital of Illinois,' is a good starting point with available parking.
Yes, the trail connects several towns like Harrisburg, Vienna, and Karnak, where you can find amenities such as cafes and groceries. For example, the routes Blue Hole Pond loop from Luigis Pizza and Leisure Lake loop from Luigis Pizza both start from a pizza place, indicating food options are available in nearby communities.
The Shawnee National Forest section offers ample shade from a high canopy of trees, making it pleasant during warmer months. Spring brings woodland wildflowers, while summer showcases prairie flowers and grasses. The 'nature's own air conditioning' effect of the tunnel can be refreshing on hot days. Consider spring and fall for milder temperatures and vibrant natural beauty.
The trail itself follows a former railroad bed with historical significance, originally founded by Civil War General Ambrose Burnside. You can explore the Forman Depot Museum in Vienna and the Stonefort Depot Museum for local historical context. Nearby attractions include the Historic Dalton Post Office, Trevitt Hall, The Chester House Hotel, and Hotel Dalton.
The Tunnel Hill area is unique due to its combination of a well-maintained, largely crushed gravel trail built on a historic railroad bed, offering gentle grades. It features a diverse landscape from agricultural fields to the dense Shawnee National Forest and ancient cypress-tupelo swamps. The 543-foot tunnel and 23 scenic trestles provide distinctive experiences. It also serves as a crossroads for major long-distance routes like the River to River Trail and the TransAmerica Bike Route.
The road cycling routes around Tunnel Hill vary in length, with the shortest being the Lake Kathy loop from Dalton at 33.0 miles (53.2 km), typically taking about 2 hours 40 minutes. The longest route listed is the Blue Hole Pond loop from CAT Scale, covering 90.1 miles (145.0 km) and taking around 4 hours 27 minutes.
Yes, the 23 trestles along the trail offer numerous scenic viewpoints, providing breathtaking vistas over bluffs and creeks. The Breeden Trestle, standing 90 feet tall, is particularly notable for its views. Additionally, sections through the Shawnee National Forest and the Cache River State Natural Area offer beautiful natural scenery and opportunities for wildlife spotting.
The trail presents varied topography, starting at 370 feet above sea level in Harrisburg, rising to 680 feet at Tunnel Hill, and then descending to 340 feet at Karnak. These elevation changes provide a challenging yet manageable ride, with gentle grades that are ideal for maintaining a consistent pace, rather than steep climbs.
Over 30 road cyclists have used komoot to explore Tunnel Hill's varied terrain. They often praise the well-maintained crushed gravel surface, the unique experience of cycling through the tunnel, and the diverse natural beauty, from forested sections to wetlands. The gentle grades are also frequently appreciated for an enjoyable ride.
The provided information does not explicitly detail public transport options directly to the trailheads. However, the trail connects various towns like Harrisburg, Vienna, and Karnak, which may have local transport services. It's advisable to check local public transport schedules for these towns if you plan to access the trail without a private vehicle.

