In this ultimate guide to ultrarunning, dive into 100 of the world's most breathtaking and brutal ultramarathons - from the icy tundras of Sweden to the sun-scorched deserts of the USA, and the rugged mountains of Europe.

Whether you're a seasoned marathoner in search of your next challenge or an aspiring runner eager to tackle your first ultra, each race is meticulously detailed with all the essential information: where to start, how to get there, and what it takes to reach the finish line.

Packed with insightful interviews with world-renowned runners and the visionary founders of these epic races, alongside detailed maps, stats, and stunning photography, this is the definitive guide to the world of ultrarunning, crafted by adventurers and authors Jen and Sim Benson.