The road to your own record
Picture the course in advance
and find the pace that fits you.

The city you want to run becomes your next trip.




THE DREAM
Every April, San Martín de los Andes, at the foot of the Argentine Patagonian Andes, hosts a trail festival with 6 distances from 12K to 100 miles.
The finish is in the central square downtown, and the 2027 edition has been announced for April 7–11.
Entry opens in stages.
Picture the course in advance
and find the pace that fits you.
Streets lined with cheers, runners all around.
You'll be part of that scene.
Take it slow with the finish still in you,
and meet the city all over again.
From the joy of finishing to the tough moments — read what runners wrote themselves.
“Along the way I climbed hills, crossed streams and ran beside a lake. I'd talk with someone for a while, then run alone for a long stretch, then meet people again and be alone again.”
This is the account of a Chilean runner who started their first 110 km at 7 p.m. on Friday and ran through the night with a headlamp. They said the aid stations (PAS), about every 10 km, even served empanadas, pizza and soup.
Quoted from the original · translated
Durante este tiempo me tocó subir cerros, cruzar arroyos, correr por el lago, ir acompañada conversando, quedarme sola mucho rato, encontrar más gente y volver a quedar sola.
Read the original on All Nutrition Nutriblog“Once the race passed the 24-hour mark, I started asking myself, "Why didn't I sign up for the 70K?"”
This is a first-person account from a runner with no mountain experience who jumped into the 110 km instead of a first marathon. They almost quit on the climb a few kilometers before the finish, but made it through the arch in the end.
Quoted from the original · translated
Después de más de 24 horas de carrera empiezo a cuestionarme “¿por qué no me anoté en 70K?”.
Read the original on Revista Noticias (Perfil)“The Andean scenery with the lake behind you is worth stopping for a few photos.”
This runner did the 42K and wrote that the pre-start shuttle, the aid and the course markings were good. They wished the course had a few more technical sections and found the finish-line food disappointing.
Quoted from the original · translated
las vistas andinas con el lago al fondo merecen un par de fotos
Read the original on carrerasdemontana.com“I went with the marathon since that's the distance I've been training for for the last few years.”This runner ran the marathon distance in San Martín de los Andes and wrote that they kept their eyes on the big black gate of the finish all the way in.
We translated a short line from each public race report and summarized the experience. Finish times are as stated by the author, and past editions may differ from this year's weather and operations.
Preview the course and read what runners who went before you wrote.
This may be from a past edition. Check the organizer for this year's course and operations.
YOUR ENTRY
Here are the ways to enter and what each requires.
Check the organizer's page for whether entries are open.
Entry dates for the next edition haven't been announced yet
Entry is first come, first served, with prices that change by stage.
Foreign runners can pay in dollars, either in one payment or in 3 installments.
For the 100 miles, you need a finish in a nonstop race of similar scale,
or a finish in this event's 110K or 100 miles, and the organizing committee reviews each application.
One of the finishes the organizing committee recognizes
Organizer's pageRACE WEEK
Know the course and time limit, and race day comes into focus.
From the 2026 edition42K: 10 hours 30 minutes
| Event | Start | Time limit | Entry fee |
|---|---|---|---|
| 42K42km | 09:00 | 10 h 30 min | $565 |
| 21K21.2km | 09:00 | 8 h | $399 |
| 12K13km | 12:00 | 5 h | $209 |
| 100 Millas160.3km | 14:00 | 42 h | $782 |
| 110K107.3km | 21:00 | 35 h | $657 |
| 70K71km | 08:30 | 23 h 30 min | $620 |
Cutoff
Finish cutoffs by race (2026 edition): 10K and 21K 17:00, 42K 19:30, 70K, 110K and 100 miles Sunday 08:00. Intermediate time limit times aren't published on the official site.
Runners start · local time — 2026 edition: 21K Wed 09:00, 42K Thu 09:00, 100 miles Fri 14:00, 110K Fri 21:00, 70K Sat 08:30, 10K Wed 12:00
San Martín de los Andes is a small mountain town on Lago Lácar.
Over five days in early April, 6 races run in turn here, from 12K to 100 miles, and the 2027 edition has been announced for April 7–11.
Each race starts at the RCM4 mountain cavalry grounds on the edge of town and finishes at Plaza San Martín in the middle of it.
The 100 miles runs about 160 km with 9,221 meters of climbing,
the 110K about 107 km with 5,730 meters, the 70K 71 km with 4,128 meters, and the 42K has 2,403 meters.
The official site says the course is based on the previous edition and may change in places for 2027.
A Spanish runner who ran the marathon in 2019 wrote that the real distance was closer to 45 km, and praised the views of Andean peaks and lakes together.
More than 1,300 runners finished the 42K in 2026.
An expo runs in town throughout race week, which makes it easy for runners and families to enjoy together.
The shorter races finish within a day, while the 100 miles is a long journey that takes you through two nights.
The organizers refine the course a little every year, and the 100 miles and 110K start on Friday afternoon and night,
so you run through at least one night. (2026 edition schedule)
Pick up your bib, check your wave.
So on race morning, you can just run.
The 2027 schedule will be posted on the official site soon.
Daily 10:00–21:00 (2026 edition)
Belgrano y Perito Moreno shuttle point (PAS)
Race-day shuttles to the RCM4 start leave from the PAS point at Belgrano and Perito Moreno, town centre. Town is compact; expo, bib pickup (Hotel Le Village) and finish are within walking distance of each other.
Shuttles run to the start on race morning (2026 schedule).
Your start time, fuel and bag drop.
Know them ahead and the run feels easier.
The starts are outside town, so each race has a pre-race shuttle from a gathering spot in town (the corner of Belgrano and Perito Moreno).
In 2026, the 21K shuttles ran 07:00–08:30, the 42K used the same window and the 70K ran 07:00–08:00.
Spectator access to the start line area and the bag drop opened 1.5 hours before each start, so check the shuttle times first.
Packet Pickup is at Hotel Le Village (Gral.
Roca 816) during your assigned time slot.
The expo is held at Club Lácar, a good place to browse gear.
You line up in a corral (start zone) based on the expected finish time you gave when you entered.
Finish cutoffs by race are 17:00 for the 21K and 19:30 for the 42K.
The 70K, 110K and 100 miles all close at 08:00 on Sunday, which makes the overall time limit about 23 hours 30 minutes, 35 hours and 42 hours, respectively.
Foreign runners pay the entry fee in dollars, and payment is accepted only through an Argentine payment app.
A separate 6% processing fee applies too.
April mornings in Patagonia are cold and the weather changes fast, so pack warm gear.
Staying downtown near the square and expo lets you get around on foot.
Bag return after the finish differs by race in location and time, so jot down the return times from the schedule in advance.
For the 70K and up, the finish stays busy right up to the Sunday-morning cutoff, so it's a good time to come out and cheer.
English may not get you far, so a few basic Spanish phrases will help. (2026 edition)
Times are local to San Martín de los Andes. Check the latest official information before the race.
STAY A LITTLE
From a hotel that makes race morning easy,
to the meals and views you'll enjoy with the medal on.
Accommodation · 205m · 3-minute walk
View on Booking.com$85
View on GetYourGuideAccommodation · 167m · 3-minute walk
View on Booking.comAccommodation · 225m · 3-minute walk
View on Booking.comAccommodation · 226m · 3-minute walk
View on Booking.comAccommodation · 176m · 3-minute walk
View on Booking.comAccommodation · 69m · 1-minute walk
View on Booking.comDistances are straight-line from the start/finish area.
Check real travel times and booking terms with each hotel.
Accommodation · 205m · 3-minute walk
View on Booking.comAccommodation · 167m · 3-minute walk
View on Booking.comAccommodation · 225m · 3-minute walk
View on Booking.comAccommodation · 226m · 3-minute walk
View on Booking.comAccommodation · 176m · 3-minute walk
View on Booking.comAccommodation · 69m · 1-minute walk
View on Booking.comApartment · 237m · 4-minute walk
View on Booking.comSwipe sideways to see more hotels.
A meal before the race, a dinner to celebrate the finish.
$85
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Be the first runner
Leave this room's first post
Not announced yet. The 2026 race entry fee was about $565.
It takes place on Wed, April 7, 2027 in San Martín de los Andes, Argentina.
Entry routes: First come, first served · Qualifying time.
Registration is handled on the official website. (From the 2026 edition)
42K: 10 hours 30 minutes. (From the 2026 edition)
10K · Marathon · Half · Ultra. (From the 2026 edition)
Spectator access opens 1.5 hours before the start (07:30 for the 42K). (From the 2026 edition)
Regimiento de Caballería de Exploración de Montaña 4 (RCM4), San Martín de los Andes. (From the 2026 edition)
San Martín de los Andes is a small mountain town on Lago Lácar.
Over five days in early April, 6 races run in turn here, from 12K to 100 miles, and the 2027 edition has been announced for April 7–11.
Plaza San Martín, San Martín de los Andes. (From the 2026 edition)