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Date: Saturday, February 21, 2026
Distances: 6K, 15K, 25K, 42K, 50K & 70K
Location: High mountain terrain in Mendoza: Penitentes, Puente del Inca, Aconcagua Provincial Park, and Villa Las Cuevas, Mendoza, Argentina
Start: Penitentes for the 42K & 70K distances, and Horcones (Entrance to Aconcagua Provincial Park) for the 6K, 15K, 25K & 50K distances
Finish: Penitentes for all distances
Check-in & Expo: Uspallata, Mendoza
Aconcagua Ultra Trail 2026 is organized by TMX TEAM
General Information
This race presents unique characteristics, exposing runners to a highly demanding high-mountain course, altitude, and extreme and rapidly changing weather conditions.
The Organization has a Race Direction Team and a Race Director, who will ensure compliance with this regulation and make decisions regarding any aspect of the event.
There will be a professional assistance team in the high-altitude section, including Park Rangers, High Altitude Doctors, Rescue Patrol, properly identified Staff, and PAS Chiefs at Horcones, Confluencia and Francia. They are authorized to make decisions validated by the Direction Team.
The decisions of the Direction Team and Race Director regarding participants, routes, timings, rankings, race termination, etc., are final and not subject to appeal.
These decisions may include requiring runners to begin descent immediately and stop racing. The responsible staff member will notify the organization and any necessary support teams.
In the high-altitude section, runners must remember they are responsible for self-evacuation to PAS Horcones.
We understand these decisions can be frustrating, but they are made by highly experienced mountain and altitude professionals, always prioritizing runner safety.
If a runner decides to continue despite the decision made by the responsible Staff, they do so under their own responsibility and without organizational support.
Questions & Inquiries
Any participant questions regarding technical aspects of the course, competition, rankings, etc., should be addressed to the Direction Team via: info@aconcaguaultratrail.com
Suspension & Modifications
The Organization may suspend and/or postpone the event due to public safety, public events, vandalism, weather conditions, pandemics or health reasons, unforeseen circumstances, force majeure, etc.
If the race is canceled for reasons beyond the Organization’s control, including those listed above, the paid registration will be credited for the next edition, with no additional cost. Registration fees are non-refundable.
Due to the specific characteristics of the race, rapidly changing and/or extreme weather conditions may require route changes for safety reasons.
If so, the new route will be communicated accordingly, including on race day (before the start) or during the race. Changes will be properly marked.
Runners are required to watch the technical briefing, which will be published on the Aconcagua Ultra Trail 2026 website and social media. It will include essential information regarding routes, safety gear, and other updates.
Image Rights
The Organization and sponsors reserve the right to use, reproduce, distribute, and/or publish photos, films, videos, recordings, and/or any visual media of the runners without economic compensation, including social media and Spartan circuit platforms.
The registration process, entry fees, deadlines, and payment methods are detailed at aconcaguaultratrail.com.
The registration fee DOES NOT include the entrance fee to Aconcagua Provincial Park. Information regarding fees and payment methods for entry to Aconcagua Provincial Park is detailed during the registration process.
The registration fee does not include transfer transportation from Uspallata to the start line, nor from the finish area back to Uspallata.
No registrations will be accepted on race day.
If it is detected that a registered participant has transferred their entry to another person to replace them in the event, the runner who participated will be disqualified and both parties (the original registrant and the replacement) will be excluded from future events organized by the Organization.
Accreditation and race kit pickup will take place on February 18 in the City of Mendoza and on February 20, 2026 in Penitentes.
At the time of accreditation to collect their bib number and race kit, competitors must present the following documents:
- Original identification document or passport
- The documents indicated in the “Mandatory Documentation” section, as applicable:
- Medical Certificate: The medical certificate is mandatory and must be completed by a physician. The certificate must include the runner’s first name, last name, and ID number, and must expressly state that the runner is medically and physically fit to participate in Aconcagua Ultra Trail, indicating the corresponding distance.
The medical certificate must include the issue date, signature, and stamp of the issuing physician, and must have been issued within four (4) months prior to the race. No other type of certificate will be accepted.
The medical certificate must be uploaded in advance to the corresponding runner profile for approval. Once approved, it must be presented in physical format (not digital) when picking up the race kit.
- Medical Form: The medical form is mandatory and must be completed by the participant. It must be downloaded, printed, completed, and signed.
The medical form must be uploaded in advance to the corresponding runner profile for approval. Once approved, the process is complete and it does not need to be presented when picking up the race kit.
- Liability Waiver: The liability waiver is mandatory and must be completed by the participant. It must be downloaded, printed, completed, and signed. It will be required when picking up the runner’s kit.
- Park Entry Authorization: Authorization to enter Aconcagua Provincial Park is mandatory. This is a specific liability waiver required by park authorities. It must be downloaded, printed, completed, and signed, and will be requested when picking up the runner’s kit.
- Medical Certificate: The medical certificate is mandatory and must be completed by a physician. The certificate must include the runner’s first name, last name, and ID number, and must expressly state that the runner is medically and physically fit to participate in Aconcagua Ultra Trail, indicating the corresponding distance.
- Payment of the Park Entry Fee.
Registration Fee: Available at aconcaguaultratrail.com according to the registration date.
Note: If payment is not completed within the indicated registration deadlines, the Organization may cancel the pre-registration request without prior notice. Completing the online registration form does not guarantee a spot. The only way to secure a place is by fully paying the registration fee, subject to availability.
*If the registration fee is paid in installments, installments must be paid monthly. This is not an automatic debit system. Upon payment of the first installment, the registration fee is frozen.
*Late payment interest of 1% per day. After 30 days of non-payment, the installment plan will be cancelled and the amounts paid will be forfeited.
*Payment methods in Argentina: Electronic payments only via Mercado Pago. A service fee will be added (5.7% + VAT).
Registration Refund (Consumer Protection Law)
After this period, the registration fee is NOT refundable.
Non-transferability of Registration
Recognition of Registration for the 2027 Edition
- 100% of the amount paid if participation is cancelled by January 31, 2026.
- No percentage will be recognized if participation is cancelled on or after February 1, 2026.
Withdrawal Request
Discounts do not apply to distance changes.
Distance changes must be requested exclusively via email: info@aconcaguaultratrail.com.
The participant must declare under oath that they do not have physical conditions or injuries that may affect their health due to participation.
Participation implies responsibility for the data provided, full acceptance of the race regulations, liability waiver, terms & conditions, and fee payment.
By participating, the runner releases TMX SRL, MKM, Spartan Race SAU, sponsors, affiliates, controlling companies, representatives, directors, and shareholders from any claim or liability, including theft, damage, injury, or health issues before, during, or after the race.
Minimum age for 6K is 12 years.
For minors, registration & liability waiver must be signed by parent or legal guardian.
Under no circumstances may minors compete in longer distances.
Timing will be controlled via chips or manual systems. Passing through control mats at Start, checkpoints, and Finish is mandatory to appear in results. In manual controls, bibs must be visible.
External assistance is not permitted on course or aid stations. Staff will be available.
There will be Aid and Control Stations and a Full Aid Station at Desvío Leñas for 70K runners. They may send a drop bag (up to 5kg). Bags are not refrigerated. Organization is not responsible for loss or damage.
Runners must not litter and must carry waste to the Aid Stations or Finish.
Trash containers will be available.
Littering = immediate disqualification (non-negotiable).
Park Rangers may stop runners and file legal sanction reports.
If hidden, runners may be stopped by Rangers to verify park entry permission.
Each distance has a specific mandatory gear list provided in the Runner Guide.
70K runners must start with headlamps on (100 lumens minimum) and keep them on until 8:00 a.m. From 5:00 p.m., headlamps must be carried, and from 6:45 p.m., turned on.
Assistance between runners is allowed.
Oxygen devices (except ambient air) are prohibited.
Only those completing the full course of their distance will be classified.
DNF = Did Not Finish for incomplete distances.
No partial distance certificates will be issued.
Finishing after cutoff or modified course = DNF.
Runners must notify staff if someone is in trouble.
Unsportsmanlike conduct, disobedience, or rule violation = disqualification.
Withdrawals must be reported at Aid Stations, Start, or Finish.
Runners must inform if under medical treatment and submit documentation.
Detection of WADA-prohibited substances = immediate and permanent ban.
Prohibited Substances: Based on WADA list:
https://wada-main-prod.s3.amazonaws.com/resources/files/wada-2016-prohibited-list-esp.pdf
Male 18–29 – Female 18–29
Male 30–39 – Female 30–39
Male 40–49 – Female 40–49
Male 50–59 – Female 50–59
Male 60+ – Female 60+
… *(all identical to Spanish version, English keeps same structure)*
6K Distance
This is a participative distance. No rankings or awards.
Age as of race day.
Notes:
1. Categories based on age at race day.
2. Must be 16 by Feb 20, 2026 to run 15K.
3. Must be 18 by Feb 20, 2026 to run 25K, 42K, 50K & 70K.
4. Minimum age for 6K is 12.
Trophies for top 3 overall men and women in all distances.
Medals for top 3 in each age category (men & women).
Note: Overall winners will not be awarded in their age groups, allowing more runners to reach category podiums.
Information
Aconcagua Ultra Trail 2026