This remarkable event challenges teams of two or three ultrarunners – running together as duos or trios for the duration, NOT in a relay – to tackle an unimaginable traverse of Southern California deserts and mountains. The  route covers 81 miles (130km) from Salton City (elevation 234 feet / 71m below sea level) to Palomar Mountain, the almost tallest mountain in San Diego County (elevation 5500 feet / 1676m.)* Eight of the 81 race miles pass through Anza-Borrego State Park on a single track trail from Borrego Springs to Ranchita, creating a race route which is a mix of road and trail. There is a total elevation gain of over 9000 feet (2740m).

The eleven previous editions were received with wide acclaim. The twelfth edition – with a limit of 100 runners – is scheduled for April 26-27 (Saturday-Sunday), 2025.

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