Lean Horse 100 Ultra Marathon
Custer, SD
- 100 Miler, 100 Mile Relay, 50 Miler, 30 Miler, 30 Mile Relay, 20 Miler
- Trail (Unpaved)
- Official race website
The Lean Horse Ultra Marathon is run in August every year in the Black Hills of South Dakota and is considered to be one of the best first time ultras in the country because of the great running surface (crushed limestone) and gentle elevation changes. It was first run in … MORE
Local Historical Weather (Jul 31):
| 2025 | 2024 | 2023 | 2022 | 2021 | |
| H (°F) | 65 | 77 | 82 | 91 | 77 |
| L (°F) | 57 | 58 | 58 | 63 | 59 |
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This could be a great race!!!
The good and bad - The good - the race location is fantastic! We wrapped a whole friends vacation around it. The trail/ course and scenery is the best! Non- … MORE
The good and bad –
The good – the race location is fantastic! We wrapped a whole friends vacation around it. The trail/ course and scenery is the best! Non- technical. So it’s for everyone.
The bad – some room for improvement here. The shirts/ swag are just ok 5/10 (weird silver ink logo, no distance noted (50 miler/ 100 miler, etc.). The aid stations could use some work – there are a few that are pretty far apart (up to 8 miles), leaving me out if water a few times (yes, I filled up. It was hot!). Aid station supplies were not great – not much real food available at most (I asked for ramen at multiple stations that didn’t have it, I did score bacon and potatoes at one station, but it seems like they would have it at all. More to be said, but it’s more of the same. Also, the ambiance was lacking! No music, not much cheering. Not normal to me at all in the many races I’ve ran. Lastly, and important, the finish line was dead! Not much for cheering, or food, or drinks. Just take your pic w a banner and go.
With some very minor adjustments, this race could be fantastic. I hope they invest a little more to make it great – I’d surely do it again. If they did.
Great place for an Ultra PR
I ran the 30 miler in the 2023. Here is my take. The good: the course is beautiful. The Black Hills is a gorgeous place to run a race. The … MORE
I ran the 30 miler in the 2023. Here is my take.
The good: the course is beautiful. The Black Hills is a gorgeous place to run a race. The course is simple too. You run out on a crushed gravel trail, removed from cars, then turn around at the halfway point and run back. There is no possibility of wrong turns or extra distance from not taking the tangents. The course also doesn’t have any major hills. Most of the course is either a steady and manageable uphill or downhill, nothing dramatic. 99.9% of the course is on gravel trails. I wore trail running shoes, but one could have easily ran the course with road shoes too.
The race is well-organized. I felt prepared for all the details of the race from race director emails. The entire day went off without a hitch. The aid stations have everything you need. All I brought was a water bottle. They had plenty of water and tailwind, and enough variety of food to easily cover all my fuel needs. I prefer fruit when I run so I ran the 30 miles on watermelon, bananas, and the occasional chips. There were lots of other options too, I just didn’t partake. The race logistics are simple too. You start and end at the high school football stadium. There is plenty of parking and room to warmup/stretch/cool down before and after the race. The race shirt we get is great! I love the color and it’s not cluttered with advertisements like so many race shirts. I am picky about which shirts I keep, and this is one I am keeping. I also appreciated the free pictures posted on Facebook after the race.
Areas that could improve: instead of a medal, finishers get a mug. I have a display at home for all my medals so I was bummed to see we didn’t get one.
The post-race festivities are pretty much non-existent. There was a person at the finish line who took my picture, and another who handed me the mug. I think the runners just go home afterwards. I have been to many races where there is a party afterwards with grilling, music, and fun games like cornhole or ladder golf. This race didn’t have any of that.
Overall, the positives far outweighed the negatives. I enjoyed the race and so much about it.
Just keep moving forward...
Overall Rating: Outstanding course and volunteers...maybe the best aid station workers anywhere! Course Difficulty: I struggle with rail trails, and this was no exception. The course was smooth with crushed … MORE
Overall Rating: Outstanding course and volunteers…maybe the best aid station workers anywhere!
Course Difficulty: I struggle with rail trails, and this was no exception. The course was smooth with crushed limestone (typical rail trail) with really long drawn out ups and downs. I’m pretty sure we were never on flat ground and we only went over a total of three hills in the entire 100 miles…so yes, there was one 18.5 mile uphill. Up to about 50 miles I was on track for a 22-24hr finish…then the incessant pounding of my feet got the best of me and I limped the rest of it and made just over 29 hours.
Course Scenery: Absolutely gorgeous. Since I was walking a lot, it was nice to be surrounded by forest, rock formations, creeks with amazing rapids, and some beautiful skies.
Race Production: Perhaps the best part of the entire race. The people working at the aid stations treat you like family (the good side), and there were no surprises along the way. Packet pick up and finish line were pretty low key, but got the job done.
Race Swag: Shiny new buckle, super soft cotton tee, and hammer collapsible cup.
My Performance: As mentioned earlier, I struggle on rail trails; there just isn’t enough variability in the terrain, so my performance was not great. I think I would just sum it up by saying, “I didn’t quit”.
Final notes: This was a hard run for me, and I’m not sure I have any more 100 milers in my future. I don’t want this review to reflect negatively on the course or volunteers in any way…both were outstanding; I think I probably just don’t have the time to put in the necessary amount of miles to thrive at this distance. Of course, it has only been 1 day since I completed the race, it could just be my aching feet talking…I suppose time will tell.
Scenic trail in the Black Hills
This year the 50K was switched to a 30 mile run. I had finished the 50 mile run a few years ago, but this was the first time running the … MORE
This year the 50K was switched to a 30 mile run. I had finished the 50 mile run a few years ago, but this was the first time running the 30 mile. The race started on the Custer High School track, which actually was near the hospital and not the high school. I couldn’t find the address for the start anywhere on the website or in any of the pre-race emails, but fortunately I remembered where it was from a few years ago. Not everyone was so lucky. Anyway, the 30 mile, 50 mile, and 100 mile runners all started at 6 a.m. After circling 3/4 of the track, we then went onto the Mickelson Trail and headed for Hill City. Along the way, we passed a lot of beautiful granite cliffs, ran alongside Spring Creek, and were treated to a view of the Crazy Horse Monument (from a distance). We climbed up a gradual slope from the start to the road to Crazy Horse, and then it was downhill to Hill City. At the Hill City aid station, the 30 mile runners turned around and ran back to Custer. The trail was very smooth, with fine crushed limestone, but I didn’t have any problems with getting debris in my shoes. The altitude didn’t bother me at all, and it was very enjoyable except for a 5-mile stretch between miles 20 and 25 when my hip flexors tightened up. I think I need to work on leaning forward a little more on the uphills and shorten my stride to engage my gluteal muscles a little more. This is a great ultramarathon for both beginners and experienced ultrarunners.
Great first-time 100, despite my DNF
I only wish I hadn't DNF'd this race, because it was the PERFECT course for a first 100 miler. It is an out-and-back and I managed 56.6 miles (before dropping … MORE
I only wish I hadn’t DNF’d this race, because it was the PERFECT course for a first 100 miler. It is an out-and-back and I managed 56.6 miles (before dropping due to personal fueling issues), so I got a feel for the entirety of the course. Coming from Colorado I’m kind of a snob when it comes to scenery and this course did not disappoint – it was extremely beautiful terrain through the Black Hills without being very difficult (aside from the “100 miles” part) or technical. The entire course is run on the Mickelson Trail which is a former rail line route that was converted to a nice soft crushed gravel trail with minimal elevation gain and loss (gentle ups and gentle downs). The race had aid stations every 4-6 miles which was great, and they were all very well stocked with helpful and friendly volunteers. Since the course is only on one trail, there weren’t any course markings – but you also couldn’t get lost (so long as you stayed on the trail). The driving directions for crew were okay, although I pre-drove it prior to the race to make sure we could find everything which helped immensely, especially since we weren’t familiar with the area. The race shirts were great and the awards and finisher’s buckles looked great (despite not receiving one myself). Overall, I highly recommend this one and definitely hope to head back in the future!
My new favorite race
Small town race, very accommodating course and race director, volunteers are the friendliest people on the planet, showers after, race day packet pickup, freakin' blueberry pancakes at mile 25! Only … MORE
Small town race, very accommodating course and race director, volunteers are the friendliest people on the planet, showers after, race day packet pickup, freakin’ blueberry pancakes at mile 25! Only potential concerns to some folks would be the elevation (around a mile high) and the inclines/declines (no real hills to speak of, but because the course is a former railroad line there can be miles of slight uphill, followed by miles of slight downhill) I’m going to try to come back for the 100 next year. I set a new personal best for the 50 miler, sub10!