Tunnel Hill 100 Course Profile

Vienna, IL, Illinois

• Distance: 100 miles
• Elevation Gain: 2,500 ft
• Elevation Loss: 2,500 ft
• High Point: 440 ft
• Low Point: 420 ft
• Time Limit: 30 hours
• Month: November
• Finisher Rate: ~80%

One of the fastest 100-mile courses in North America, following a flat crushed limestone rail trail through southern Illinois. The course passes through a historic railroad tunnel and is a favorite for runners chasing PRs and 100-mile buckles.

Aid Stations

Name	Mile	Elevation	Crew Access	Drop Bag	Cutoff
New Burnside	15	430 ft	Yes	Yes	—
Tunnel Hill	25	435 ft	Yes	Yes	—
Turnaround	50	430 ft	Yes	Yes	15:00
Tunnel Hill Return	75	435 ft	Yes	Yes	22:00
New Burnside Return	85	430 ft	Yes	Yes	25:00

Course Segments

Segment	Miles	Terrain	Difficulty	Notes
Vienna to Tunnel Hill	0–25	flat	easy	Flat rail trail. Run through the historic tunnel.
Tunnel Hill to Turnaround	25–50	flat	easy	Flat and fast. Bank time if feeling good.
Turnaround to Finish	50–100	flat	moderate	Return trip. November weather can add challenge.

View the full interactive elevation profile, 3D course flyover, and race strategy tools on HARDN.