Tunnel Hill State Trail Illinois
A 45-mile crushed limestone rail-trail in Southern Illinois, featuring a historic railroad tunnel and diverse natural scenery.
Highlights
Must-see attractions
Social
From TikTok & Reddit
Best Time
Cooler temps, beautiful foliage
Tunnel Hill State Trail Illinois
Best Time
Cooler temps, beautiful foliage
Highlights
Must-see attractions
A 45-mile crushed limestone rail-trail in Southern Illinois, featuring a historic railroad tunnel and diverse natural scenery.
"This trail is a must-do for cyclists, offering a scenic, shaded ride with a unique tunnel experience."
Bring a Bright Light! 🔦
Essential for navigating the dark railroad tunnel. Don't risk hitting the walls!
Cash for Sandburn Junction 🍦
This popular stop offers ice cream and rentals, but they prefer cash payments.
Quick Facts
Rating
4.8 · 157 reviews
Type
State Park
Highlights
Discover the most iconic attractions and experiences
The Iconic Railroad Tunnel
North of Tunnel Hill
Cycle through a historic, over 500-foot-long railroad tunnel, a unique and memorable experience.
+1
Scenic Rail-Trail
Entire 45-mile length
Enjoy 45 miles of crushed limestone trail through diverse landscapes, from forests to wetlands.
+1
Sandburn Junction
Near Tunnel Hill Trailhead
A perfect stop for refreshments, offering ice cream, water, and bike rentals. Bring cash!
Plans like a pro.
Thinks like you
Planning Your Visit
Plan Your Ride Length
Tunnel Light is Essential
Best Times
Insider Tips
from TikTok, Instagram & Reddit
Bring a Bright Light! 🔦
Essential for navigating the dark railroad tunnel. Don't risk hitting the walls!
Cash for Sandburn Junction 🍦
This popular stop offers ice cream and rentals, but they prefer cash payments.
Check for Trail Obstructions 🌳
Occasionally, fallen trees can block the path. Be prepared for minor challenges.
Consider a Shorter Ride 🚴♀️
The 45-mile trail is long. Opt for an out-and-back section for a more manageable day trip.
Tips
from all over the internet
Bring a Bright Light! 🔦
Essential for navigating the dark railroad tunnel. Don't risk hitting the walls!
Cash for Sandburn Junction 🍦
This popular stop offers ice cream and rentals, but they prefer cash payments.
Check for Trail Obstructions 🌳
Occasionally, fallen trees can block the path. Be prepared for minor challenges.
Consider a Shorter Ride 🚴♀️
The 45-mile trail is long. Opt for an out-and-back section for a more manageable day trip.
Pack Water & Snacks 💧
While water is available at Sandburn Junction, carrying your own is always wise.
What Travellers Say
Reviews Summary
Visitors rave about the Tunnel Hill State Trail's well-maintained crushed limestone surface and extensive shade, making it ideal for long rides. The historic railroad tunnel is a unique highlight, though a light is essential. While generally praised, occasional fallen trees can present minor challenges.
"Rode the trail in mid October 2025 from the very northern terminus in Eldorado to its Southern Terminus near Karnak, IL. The trail was in good shape with some bumpy spots where the trail had been patched with larger rock but all in all the surface is in good shape. Cudos to the Illinois Dept of Natural Resources in keeping up with the maintenance of this beautiful trail. The trail goes through many beautiful eco systems. From open prairie, rolling hills and farms, rugged hills and forest, and wetlands. Of course the main attraction is the tunnel. It is very neat. Warning: bring a light! Although it does not seem like it would be needed lots of folks have rode into the tunnel walls in the darkness. Lots of places to get water on the trail and vault toilets are also numerous. Definitely stop at Sandburn junction and get a ice cream! Camping is available in Karnak, Il right on the trail. Google Main Brothers Campground Karnak Il for details. The park in Vienna is a nice spot. The trail museum is here but it's hours are a mystery. The city of Vienna also has a rail road museum there as well. There are several food options on Vienna. A newly built bike path takes you past most. And a quick trip down town takes you to Neds Shed which is an area icon for bbq and burgers. Best time to travel this trail is in the fall in my opinion. Although even in the summer this trail is well shaded and comfortable to ride. So get out there and ride!!"
Scott Stocking
"Loved the trail! Nice long easy ride almost entirely shaded. My only complaint is a couple of trees down across the trail just north of the tunnel. I sure hope they get them moved before my return trip tomorrow. The first one was a real challenge to get the bikes around."
Dr. Stephen King
"Super trail for beginners or expert cyclists. We traveled from Vienna south to Karnak, but the wetland center was only a couple more miles. It was about a 22 mile trip down and back. The trail was an old railroad bed formatted for bikes..some rocky areas but mostly easy biking. Nice bridges over creeks were also on the route. I did see one snake on the trip. There are wetlands and forest areas on both sides. Karnak and Vienna both have bathrooms and fresh water."
Sally Parker
What People Like
What People Dislike
Frequently Asked Questions
🚇 🗺️ Getting There
The Tunnel Hill State Trail is located in Southern Illinois. Major trailheads are in Vienna and Eldorado. Vienna is accessible via IL-146, and Eldorado via US-45. Many visitors access the trail from the Vienna trailhead, which offers parking and amenities.
The Tunnel Hill State Trail is primarily designed for biking, hiking, and horseback riding. While you can drive to trailheads, the trail itself is not for vehicles.
Popular parking areas include the trailhead in Vienna, which is near the park and trail museum, and the trailhead in Eldorado. Sandburn Junction also offers parking and amenities.
Yes, Vienna, Illinois, is a key access point for the Tunnel Hill State Trail. It features a park with a museum and is a good starting point for exploring the southern sections of the trail.
Public transportation options directly to the trailheads are limited. It's generally recommended to have your own vehicle or arrange for transportation to reach the trail.
🎫 🎫 Tickets & Entry
No, there is no admission fee or ticket required to access and use the Tunnel Hill State Trail. It's a public park managed by the Illinois Department of Natural Resources.
The Tunnel Hill State Trail is generally open from dawn to dusk year-round. However, specific facilities like the trail museum in Vienna may have limited hours.
Parking at the designated trailheads for the Tunnel Hill State Trail is typically free of charge.
Camping is available in Karnak, IL, right on the trail. For details, you can search for Main Brothers Campground Karnak, IL.
Yes, the Tunnel Hill State Trail hosts events like the Tunnel Hill 100/50 mile runs, which have also served as USATF National Championships. Check event schedules for dates.
🎫 🚴♀️ Onsite Experience
The trail is primarily a crushed limestone surface, making it suitable for cycling, hiking, and other non-motorized activities. Some sections may have minor bumps from repairs.
The Tunnel Hill State Trail spans approximately 45 miles from its northern terminus in Eldorado to its southern terminus near Karnak.
Yes, a significant portion of the Tunnel Hill State Trail is well-shaded by trees, making it comfortable for riding even during warmer months.
Vault toilets are numerous along the trail, and water is available at Sandburn Junction and in towns like Karnak and Vienna.
Visitors often report seeing various wildlife, including birds and snakes, in the diverse ecosystems along the trail, which include forests, wetlands, and prairies.
🍽️ 🍽️ Food & Dining
The city of Vienna has several food options accessible from the trail, including Ned's Shed for BBQ and burgers. Sandburn Junction also offers snacks like ice cream.
While there are no restaurants directly on the trail, Sandburn Junction offers refreshments. For full meals, you'll need to access nearby towns like Vienna or Eldorado.
Yes, Sandburn Junction is a popular spot to buy snacks, drinks, and ice cream. It's recommended to bring cash as they may not accept cards.
Vienna offers various dining choices, including BBQ and burgers at Ned's Shed. A newly built bike path in Vienna helps cyclists access these options easily.
It's a good idea to pack some snacks and water, especially if you plan a longer ride, as dining options are concentrated in specific areas.
📸 📸 Photography
The historic railroad tunnel is a must-photograph spot. Other scenic areas include the diverse ecosystems, bridges, and the general trail vistas.
It's best to pull over to a safe spot before taking photos, especially on the main trail where other users may be present. Be extra cautious if stopping near the tunnel.
Early morning or late afternoon light can offer beautiful golden hour shots. However, the trail is well-shaded, so midday can also be pleasant for photography.
Yes, you can take photos inside the tunnel, but it's extremely dark. A strong flashlight or camera flash is essential for any usable photos.
Besides the main tunnel, look for scenic bridges, the varied forest and wetland landscapes, and any historical markers or ghost towns mentioned along the route.
Social
from TikTok, Instagram & Reddit