An ultra marathon is classified as any running event exceeding the traditional marathon distance of 26.2 miles (42.2 km). Apart from this lower limit, there are virtually no constraints on distance, terrain types, or weather conditions. This lack of restrictions makes ultra marathons some of the most unique and challenging athletic events worldwide, promising not only physical exertion but also breathtaking experiences in nature.
Participants in ultra marathons can encounter a diverse range of terrains – from jagged mountain ridges and snow-capped peaks to lush valleys and volcanic landscapes. Engaging in such events allows athletes to intimately experience a region’s natural beauty while pushing their physical and mental boundaries.
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After insightful discussions among the Outdoors Magic team, including experiences from seasoned ultra runners, we have compiled a list featuring some of the best ultra marathons across the globe. Please note that while we strive for up-to-date information, some marathon dates may change and should be verified before planning.
The Best Ultra Marathons Around the World
Often described as life-changing journeys rather than mere races, here are our chosen ultra marathons, with no specific order in their ranking:
- Ultra Trail du Mont Blanc, The Alps
- Dragon’s Back Race, Wales
- Comrades Marathon, South Africa
- Western States 100, California, USA
- Spartathlon, Greece
- Marathon des Sables, Morocco
- Ultra X 125, Scotland
- Fire & Ice Ultra, Iceland
- Tarawera Ultramarathon, New Zealand
- Montane Lapland Arctic Ultra, Sweden
Ultra Trail du Mont Blanc, The Alps
Location: France, Italy & Switzerland
Distance: 110 miles (170 km)+
Date: 26th to 31st August 2025
The Ultra Trail du Mont Blanc (UTMB) is one of the most celebrated ultra running events globally. Each August, this prestigious race draws competitors from around the world to traverse the stunning landscapes surrounding Mont Blanc, crossing borders between France, Italy, and Switzerland. The primary race involves a challenging 110+ mile loop that navigates through diverse terrains, including rivers, alpine villages, and dense forests.
Most participants complete the race within 32 to 46 hours, while elite competitors manage to finish in about 20 hours. With a staggering elevation gain of over 10,000 m, the event features a finish rate of approximately 60% each year. Qualifying for the UTMB is highly competitive, requiring runners to earn qualifying points from other recognized trail races before they can enter the lottery for a coveted spot.
Dragon’s Back Race, Wales
Location: Welsh Mountains
Distance: 236 miles (380 km)
Date: 1st to 6th September 2025
The Dragon’s Back Race is one of the most arduous ultra marathons, stretching along the rugged mountainous spine of Wales, crossing the Brecon Beacons and Snowdonia National Parks. With an astonishing elevation gain of 57,087 ft (17,400 m), the ascent roughly equals twice the height of Mount Everest.
Runners typically cover around 63 km daily over the six-day event, equivalent to one and a half marathons each day. Participants are provided tented accommodations, along with food and drinks throughout the duration. Memorable highlights include the challenging Crib Goch scramble, the picturesque Snowdon horseshoe traverse, and the serene beauty of the Cambrian mountains, culminating at Cardiff Castle.
13 Valleys Ultra, England
Location: The Lake District
Distance: 115 miles (184.3 km)
Date: 26th to 28th September 2025
The 13 Valleys Ultra invites runners to experience the stunning landscapes of the Lake District, covering an impressive 115 miles (184.3 km) through rugged terrain. This event features various race lengths, from shorter 22 km to ultra distances such as the 55 km, 110 km, and the flagship 13 Valleys race. The latter involves over 7,000 m of elevation gain and has a strict time limit of 46.5 hours for completion.
Each of these ultra marathons not only tests the physical capabilities of the participants but also offers an unparalleled opportunity to explore some of the most beautiful landscapes on Earth. If you’re seeking a unique and challenging athletic adventure, consider entering one of these extraordinary events in 2025.
