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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| 100K+ | Gravel | Mar 6, 20279:00 AM | $85$95 after Feb 6, 2027 | 750 |
| Single Speed - 100k+ | Gravel | Mar 6, 20279:00 AM | $85$95 after Feb 6, 2027 | 750 |
| Tandem Team 100K+ | GravelRelay or team | Mar 6, 20279:00 AM | $85$95 after Feb 6, 2027 | 750 |
| Half Dirty | Gravel | Mar 6, 20279:15 AM | $80$90 after Feb 5, 2027 | 750 |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
Online registration closes Mar 6, 2027, unless the race fills first.
Sunrise on race morning is at about 6:23 AM, and the 100K+ starts at 9:00 AM. The start sits about 760 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
1 Main St, Alto Pass, IL 62905
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
National lists computed from results, entry fees, course maps and water temperatures; they refresh through the day.
Aggregated from official results (So iLL Racing) for The Dirty South Roubaix. Individual finisher names are not stored here.
At the 2026 100K+, the fastest tenth finished in 3:36:54 or better, the top quarter in 3:58:22, and half the field in 4:29:39; the last tenth came in after 5:37:51.
At the 2026 Half Dirty, the fastest tenth finished in 1:55:58 or better, the top quarter in 2:08:21, and half the field in 2:25:32; the last tenth came in after 3:28:58.
At the 2026 Single Speed - 100k+, the fastest tenth finished in 3:55:14 or better, the top quarter in 4:02:00, and half the field in 4:50:44; the last tenth came in after 5:35:42.
| Age | Women | Men |
|---|---|---|
| Under 20 | n/a | 4:05:36 |
| 20-29 | n/a | 3:22:40 |
| 30-39 | 3:53:56 | 3:17:03 |
| 40-49 | 4:53:33 | 3:23:05 |
| 50-59 | 4:51:37 | 3:32:05 |
| 60-69 | n/a | 3:57:16 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
Where a finish time would have placed in 2026.
Down 16 percent since 2025.
All events combined, from official results.
From 2025 to 2026, the field went from 373 to 269 finishers, and the median time dropped from 4:31:19 to 4:29:39.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 269 (-28%) | 4:29:39 | under 3:36:54 | 3:01:46 |
| 2025 | 373 | 4:31:19 | under 3:36:43 | 3:10:38 |
From each year's official results for the Gravel; virtual options are left out.
Around March 6 the day usually runs from 38°F at dawn to 62°F in the afternoon, with measurable rain on about 28% of days. Cold snaps dip to 27°F and hot years reach 73°F.
Based on 76 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What the organizers of The Dirty South Roubaix cover on their registration page, in brief.
Schedule and packet pickup
Packet pickup the night before the race will be located at the St. Nicholas Brewing Company location at the Carbondale airport (airport code MDH). They have an awesome restaurant and bar at the airport. With this spot close to the event…
Course
GPX file will be provided for each course ONE week before the race. The turns will be marked. The courses will be on open roads, so there may be vehicle traffic in areas. Road surfaces can be buttery smooth asphalt, chipseal, smooth…
Course
Most of us ride gravel bikes or cyclocross bikes with light knobbies or file treads on these rides. Some people ride MTBs with light knobbies. If I had to suggest a bike to ride on this course, it would be a gravel/cyclocross bike…
Parking and travel
Lodging options will be shared on the event page for anyone looking to stay local. There are many cabins and B&B in the area on the wine trail. Hotels in Carbondale, Anna or Murphysboro aren’t too far away either.
Rules and FAQ
Transferring your spot to another rider: The Transfer to Another Runner option can be found by logging on to RunSignup, navigating to Profile > Upcoming Events > Manage Registration > Transfer to Another Runner. The Transfer to Another…
Organize this race? Add details or a correction
2026 was another great year for the DSR and it seems 750 is the magic number for the village of Alto Pass. The 11th year of the Dirty South Roubaix is coming up on March 6th 2027. Last year we sold out to the 750 registered in under 2 weeks, so don't wait around if you want in on the event this year. We expect a sell out quickly again. Alto Pass has been so welcoming, that we will be back there again. Like years in the past, we are planning to offer the 100k+ as the main event of the day, but will also offer a shorter course for anyone who doesn't want to tackle the full 100k.