8 Challenges Worth Training For

From an Antarctic marathon to the roof of Africa, here are 8 challenging hikes we can all aspire to.

It's a new year. You've set your ambitious hiking goals. You've stepped up your training regimen. You're eating better. And now you're ready to start dreaming big. From Antarctica to Africa to North America's premier long trails, here are nine of the most challenging hikes, climbs, and events worth aspiring to.