Extremo Sul Ultramarathon

Event Overview

Course & Terrain

Linear south-to-north beach crossing between Chuí and Cassino, supported by six intermediate bases and two drop-bag points.

Key course features to know before comparing this race:

• Start on the Uruguay border in Chuí
• Farol do Albardão lighthouse, near the first rest base
• Night stretches with only the surf for company
• Finish at Barra do Cassino in Rio Grande

Almost all beach, with the sea on the runner’s right from start to finish. The opening kilometers from Chuí town to Barra do Chuí are on the RS-699 asphalt road; after that the surface switches between soft sand, firm sand and transition zones, with tree trunks and other debris, high tides and authorized vehicles sharing the beach. The course is not marked, but navigation is simple and the organizer publishes a GPX track. Some stretches are completely isolated, especially at night, and the reflective vest is mandatory from 6:00 PM to 6:00 AM because of vehicle traffic on the sand. The Farol do Albardão lighthouse, around km 96, is the main landmark.

Changeable. The organizer says past editions have run in temperatures above 35°C and below 20°C, through rain, strong wind, thunder and fog, and some runners have been pulled for safety. INMET’s 1981–2010 normals for Rio Grande give November an average high of 24.2°C (76°F) and low of 16.4°C (62°F), with 95.5 mm of rain on about seven days. Wind is the recurring story: 2021 winner Vítor Rodrigues said it never let up, and the 2024 race brought sudden rain, strong wind and a cold night. On November 20, 2026, the sun sets at 7:10 PM in Rio Grande and rises at 5:17 AM, so most runners spend one or two nights on the beach.

Entry & Logistics

Why This Race Matters

The Extremo Sul Ultramarathon is a non-stop run up Brazil’s southern coast, from the Uruguayan border at Chuí to Cassino, on the beach the organizer bills as the longest in the world. Portuguese sports-tourism company Horizontes organizes it. Its results archive starts in 2015, when Uruguay’s Anibal Lavandeira won in 33:52:02; with no race in 2020, the 2025 race was the 10th edition. Portugal’s Vítor Rodrigues ran the fastest time, 27:00:00, in 2021, breaking João Oliveira’s 27:45:00 from 2019. Finish rates have ranged from about 40% in 2018 and 2021 to 73% in 2025, and Moisés Carmona Torres appears as a finisher in nine of the ten editions. In 2026, the top 10 finishers earn direct entry to a 2027 Tor des Géants race.

Historical benchmark notes in the directory record (verify current records with the linked official sources):

• Men: Vítor Rodrigues (Portugal), 27:00:00, 2021
• Women: Ivoneti Wild (Brazil), 33:50:00, 2019 (third overall)
• 2025 winners: Valmor Fiamoncini, 28:29:00, and Isadora Soares, 35:13:00 (seventh overall)
• Most finishes: Moisés Carmona Torres, nine (every edition except 2017), according to the organizer’s results

Preparing for a Race Like Extremo Sul Ultramarathon

The fixed-distance race guide covers the format as a whole. These guides go deeper:

• Walking strategy for ultramarathons: When and how to walk by terrain, effort and cutoffs.
• Crew and aid-station strategy: Crew tables, aid stops, drop bags and runner preferences.
• Hydration and sodium for ultramarathons: Fluid, sodium, thirst, sweat rate and hyponatremia risk.
• Tapering for ultramarathons: Plan the taper and race week around your own recovery.

Best Fit

• Experienced 100 km finishers who want a flat but punishing point-to-point
• Runners who can look after themselves alone for 30 to 37 km at a time
• Runners chasing a direct entry to a 2027 Tor des Géants race

Planning Notes

• Prepare for sleep decisions, weather swings, and aid-station discipline. The distance is only one part of a multi-day fixed-distance race.
• The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.
• The first cutoff is tight: 23.3 km to Hermenegildo in four hours, including the asphalt start
• Gaps of up to 37.5 km between bases, with a mandatory 2 liters of water capacity
• Wind, rain and cold nights on an exposed beach; a waterproof jacket and thermal blankets are mandatory
• Blisters from wet sand: the organizer calls them one of the most frequent problems and made a blister-focused first-aid kit mandatory in August 2026

Event FAQs

Related Preparation

• Compare this race in the full 2026 calendar
• Open the Fixed-Distance format guide
• Compare all race formats
• Use the timed-race pace calculator
• Plan checkpoint arrivals and cutoff buffers
• Print a pace band for your goal time
• Estimate race calories and plan fueling
• Build a crew and drop-bag plan
• Build a race-specific gear checklist