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Stage RaceSimpler logistics
MDS 120 Jordan
Wadi Rum, Jordan
Terrain
Desert
Distance / duration
70 km, 100 km, or 120 km over 3 stages
Course
See race record
Cutoff
Maximum times for each stage and checkpoint closing times are set in the road book handed out at the technical checks. The organizer’s MDS 120 format page gives a minimum speed of 3.5 km/h and an average participant speed of 5.5 km/h. Exceeding a stage’s maximum time or missing a checkpoint cutoff means disqualification.
Each 6.71 km yard must be finished within the hour; no fixed overall finish. Runners not in the starting corral for the next yard are recorded as DNF. Warning sounds go off 3, 2 and 1 minutes before each start, but are quieter between 8:00 PM and 8:00 AM because of noise restrictions. If no runner completes one more yard than everyone else, there is no winner.
Stephen F. Austin State Park, San Felipe, Texas, USA
Terrain
Trail
Distance / duration
4.167 mi every hour
Course
Loop
Cutoff
Each 4.167-mile yard must be finished within the hour, and runners must be back inside the corral before the top of the next hour, with whistle warnings at 3, 2 and 1 minutes. There is no fixed overall finish. The race continues until one runner completes a final yard alone, and that runner cannot continue beyond it. If nobody completes one more yard than everyone else, there is no winner.
Each 6,706 m yard must be finished within the hour, and every runner must be ready to start on the hour. A whistle blows 3, 2 and 1 minutes before each start, and there are no late starts. The race has no fixed finish: it runs until one runner is left.
Each 6.706 km yard must be finished within the hour, and every new yard starts on the hour. A runner who doesn’t finish in time or doesn’t start the next yard is out, with no late starts. The race has no fixed finish: it runs until one runner is left.
Each 6.706 km yard must be finished within the hour, and the next yard starts on the hour. The race has no fixed finish: it runs until one runner is left.
96 hours (10:00 AM Sunday). Each aid station has a leave-by time based on a 2 mph pace, but the guidebook says these are not hard cutoffs; staff will remind or wake runners when a station is about to close.
27 hours (finish by 10:30 PM Saturday). Time barriers: Tai O (km 40.2) 5:15 AM, Ham Tin (km 66.5) 12:45 PM, Mui Wo checkpoint (km 85.2) 6:00 PM and Discovery Bay (km 94.0) 8:45 PM, all on Saturday.
485.3 km (Athens–Sparta–Athens); 524.9 km option to Marathon
Course
Out-and-back
Cutoff
98 hours (8:00 AM Monday, November 23) for Athens–Sparta–Athens, with cutoffs at the main stations: Megara (39.4 km) at 5:30 hours and Sparta (242.5 km) at 43 hours. The Marathon option allows 100 hours (10:00 AM Monday) but requires reaching the Agora within 93 hours.
48 hours for the headline race. All races end at 8:00 AM on Sunday, November 22, so the 100 miles, which starts at 9:00 AM Friday, has up to 47 hours. The multiday runs have no DNFs and allow no drop-downs: runners simply go as far as they can in the time.
Each 6.706 km yard must be finished within the hour. Yards start exactly on the hour, with whistles 3, 2 and 1 minutes before, and every runner must leave the start area on the signal. No fixed finish: the last runner must complete an additional yard alone. If nobody does, there is no winner.
24 hours, ending at 10:00 AM Sunday, November 22. At the end signal runners stop where they are and wait until their partial lap has been measured, which can take 10–15 minutes.
13 hours (finish line closes at 7:30 PM), with eight intermediate cutoffs starting at South Mountain Inn (mile 2.5) by 7:15 AM. Runners who miss a cutoff must withdraw, and anyone still on course after 7:30 PM is picked up by sweep vehicles.
Each 4.17-mile yard must be finished within 60 minutes, a minimum pace of 14:23 per mile, and runners must be inside the corral before the next start, with warnings at 3, 2 and 1 minutes. No late starts. There is no fixed finish. Under the backyard format, the last runner must complete one additional yard alone; if nobody does, there is no winner.
Chiang Dao to Chiang Mai, Chiang Mai Province, Thailand
Terrain
Mountain
Distance / duration
173 km
Course
Point-to-point
Cutoff
48 hours (finish by 10:00 AM Sunday). Time barriers: A3 Pagia Highland Research Station (km 32.8) 7:00 PM Friday, A5 Sop Kai Village (km 51.1) 11:00 PM Friday, A7 Mae Taeng Watershed Research Station (km 71.5) 4:00 AM Saturday, A10 Mae Ka Piang Village (km 100.2) 12:30 PM Saturday, A11 Wat Pang Hai (km 110.0) 5:00 PM Saturday, A13 Maesa Elephant Camp (km 129.9) 11:59 PM Saturday and A16 Montha Than Waterfall (km 162.4) 8:00 AM Sunday.
Each yard must be finished in under an hour, with whistles 3, 2 and 1 minutes before each start and no late starts. The day loop runs from 9:00 AM to the 5:00 PM yard on Saturday, the night loop from 6:00 PM to the 7:00 AM yard, and the day loop again from 8:00 AM to the 5:00 PM yard on Sunday, then another night if runners remain. No fixed finish: the winner completes a final yard alone, and if nobody can, there is no winner.
48 hours (finish by 3:30 PM Saturday). Time barriers: Misfat Al Abriyeen (km 21.9) 8:00 PM Thursday, Sharaf Al Alamain (km 44.5) 3:30 AM Friday, Al Roos (km 60.9) 8:30 AM Friday, Hail Al Diyar (km 88.6) 7:30 PM Friday, Safi Sahra (km 107.8) 2:30 AM Saturday, Saiq (km 124.2) 7:30 AM Saturday and Muaydin (km 145.4) 2:00 PM Saturday.
24 hours, ending at noon Sunday. A few minutes before the end, each runner is handed a card with their bib number to drop on the track at the final horn, and judges measure the partial lap from the last chip-mat crossing with a calibrated wheel.
Natural Bridge Station to Fincastle, Virginia, USA
Terrain
Mountain
Distance / duration
66.6 mi
Course
Point-to-point
Cutoff
18 hours (6:01 PM Saturday), with cutoffs at Headforemost Mountain (Floyd's Field, mile 22.5) by 6:40 AM and Bearwallow Gap (mile 42.5) by 12:30 PM. The organizer says the Headforemost cutoff may change depending on where that aid station is placed.
Each 6.706 km yard must be finished within the hour; the time left is for recovery before the next start. No fixed overall finish: the race continues until one runner completes a final yard alone.
Miami Marine Stadium, Virginia Key, Miami, Florida, USA
Terrain
Mixed
Distance / duration
6.7056 km (4.167 mi) every hour
Course
Loop
Cutoff
Each 6.7056 km yard must be finished in under an hour, and every active runner must be inside the corral at the bell, with warnings at 3, 2 and 1 minutes. No late starts or skipped yards. There is no yard cap, distance cap or preset finish. The winner must complete one more yard than everyone else; if nobody does, there is no winner.
6 days; 72, 48, 24, 12 and 6 hr; 200 mi, 100 mi, 100 km, marathon; Last Person Standing
Course
Loop
Cutoff
Each fixed-time race ends exactly 6 days, 72, 48, 24, 12 or 6 hours after its 9:00 AM start, and the last ones finish at 9:00 AM on Sunday, January 3. The 200-mile cutoff is 9:00 AM on January 3 for every start day, which leaves 96 hours for December 30 starters. 100-mile runners have 72 hours if they start December 28–31 and 48 hours if they start January 1. The 100 km and the marathon have 24-hour cutoffs.
65 hours for the 160-mile run and ski: the event closes at 11:00 PM Sunday, January 3. The Butternut Lake Lodge turnaround closes at 11:00 PM Saturday, January 2, and the Winter Huskies checkpoint closes at 9:00 AM Sunday, January 3. The 160-mile bike has 41 hours and the 80-mile race 37 hours.
Bonneville County Fairgrounds and Sandy Downs Park, Idaho Falls, Idaho, USA
Terrain
Mixed
Distance / duration
4.167 mi every hour
Course
Loop
Cutoff
Each 4.167-mile loop must be completed within the hour, and runners must be in the corral when the top-of-hour bell rings, with warnings at 3, 2 and 1 minutes. The race is open-ended. The "Last Horse Standing" must complete one more loop than the assist, or there is no winner. Loops are not officially timed; results are counted in completed loops.
No overall time limit is published. In 2026 the 200K cutoffs were 7:00 PM Friday at checkpoint 1 (mile 28, 12 hours) and 7:00 PM Saturday at checkpoint 2 (mile 77, 36 hours). Checkpoint 3 (mile 113) has no cutoff, but racers may not bivy or sleep after leaving it. The race director may pull anyone who seems unsafe or unprepared. In 2025 the last foot finisher took 61:04.
Hill Country State Natural Area, Bandera, Texas, USA
Terrain
Trail
Distance / duration
100 km (2 × 50 km loops)
Course
Loop
Cutoff
25 hours. 100K runners must start their second lap at the Lodge by 8:00 PM Saturday, and the course closes at 8:30 AM Sunday, with rolling second-lap cutoffs at each aid station. The Saturday non-competitive 50K uses the 100K cutoffs, and the Sunday 50K and 25K close at 7:00 PM Sunday.
29 hours (finish by 8:00 AM Sunday, January 10). Use the checkpoint cutoffs for pacing; the organizer’s separate pace estimate does not match a simple distance/time calculation.
74 hours (1:00 PM Sunday, January 17), with a cutoff at every support base, from 9:00 PM Thursday at Piódão to 6:30 AM Sunday at Porto de Mós. Leaving a base after its cutoff means disqualification.
36 hours: the course closes at 6:00 PM Sunday, January 17. Fifth-lap cutoffs are 11:00 AM at Makiki (mile 80), 1:30 PM at Mānoa (mile 87) and 3:30 PM at Nuʻuanu (mile 92.5), all on Sunday. Runners must check out of each aid station by those times, and the cutoffs apply to everyone regardless of mileage.
Queen Elizabeth Park, Mackays Crossing, Kāpiti Coast, New Zealand
Terrain
Mixed
Distance / duration
6.71 km every hour
Course
Loop
Cutoff
Each 6.71 km yard must be finished within 60 minutes; no fixed overall finish. Warning whistles sound 3, 2 and 1 minutes before each start, runners must be inside the corral before the horn, and there are no late starts. The last runner to complete a yard alone wins; if nobody completes one more yard than everyone else, there is no winner.
Each loop must be completed within one hour, and runners must be in the start corral before the bell, with whistles at 3, 2 and 1 minutes and a 10-second countdown. No late starts. The race is open-ended: the last runner must complete one loop alone to win, and everyone else is a DNF. In the Backyard 24, everyone who reaches 24 hours is tied for first.
60 hours: the finish at Fortune Bay closes at 7:00 PM Wednesday. Racers must leave Gateway (mile 35) by 9:00 PM Monday, MelGeorge's (mile 70) by 1:00 PM Tuesday and the Embark checkpoint (about mile 110) by 10:00 AM Wednesday. A missed cutoff ends the race, and anyone who keeps going after missing one is banned from future Arrowheads.
Northcliffe to Albany, Western Australia, Australia
Terrain
Trail
Distance / duration
347 km
Course
Point-to-point
Cutoff
104 hours (3:00 PM Sunday, April 4). Runners must leave the sleep stations by set times: Walpole by 7:00 PM Thursday (36 h), Peaceful Bay by 4:00 PM Friday (57 h), Denmark by 5:00 PM Saturday (82 h) and Cosy Corner by 8:00 AM Sunday (97 h). The Irwin Inlet jet ski crossing closes at 5:00 PM Friday (58 h).
Each loop must be finished within the hour, and a runner who is not on the start line when the hour turns is out. There is no set distance and no finish line: the race ends when one runner remains. Lightning stopped the 2025 race with two runners left, and both were declared winners.
The directory is selective rather than exhaustive. Dates, entry status, fees, routes and rules can change; verify them with the linked organizer before registration or travel.
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Frequently Asked Questions
Does the race finder list every ultramarathon?
No. It searches the selective, source-checked Multiday Running directory. The organizer and relevant federation or registration platform remain authoritative.
Why are some comparison fields blank?
A value is shown only when the directory record has source-supported information. Missing data is not inferred from similar races or older editions.
What does simpler logistics mean?
It is an editorial comparison of factors such as short loops or frequent aid access. It is not a safety rating and does not mean the event itself is easy.
How often can race information change?
Dates, routes, registration status, entry rules and support arrangements can change at any time. Confirm everything material with the organizer before committing money or travel.