EXPLORE UNBOUND

It's 100 miles from Key Largo to Key West, a distance ultrarunners must cross on foot in the Keys 100. Find out what it's like to run this epic race.

What's it like to run 50 miles on Carolina coastline sand? Find out from a Badwater Cape Fear veteran who got her sand training in the Marathon Des Sables.

Sometimes you just need a milestone to stay motivated. That's why I started running my age in miles each year, and sometimes a little more.

It's tough to drop out of a race, especially after 80 miles. But knowing where your limits is a good lesson for any runner, as I learned in the Rouge-Orleans.

My effort at the Tahoe Midnight Express Ultramarathon might have ended in a DNF, but it did its job in getting me ready for the Marathon Des Sables.

Find out what it's like to be the only ultrarunner trying for 50 miles on Antarctica, as the finale in years of effort to run 50 mile ultras on every continent.

Just getting to the start line of the Everest Marathon is an adventure! It takes a harrowing flight and days of high altitude trekking to reach Everest BC.

The Surf Coast Century is as scenic and easy-going as it gets when it comes to ultramarathons. Find out what it's like to run this borderline pleasant race.

If there's one thing I learned from the Mountainman Ultra, it's to never be late when there are single tracks and cow gates involved.

I may not podium often, but I usually don't get swept off the course as I almost did in the Marathon du Medoc. But when there's wine involved, all bets are off.

The Marathon Des Sables is an epic stage race through the Sahara Desert. Find out what it's like to run this long, hot, grueling test of endurance.

The Sahara is a hot, hostile desert – even more so when you're trying to run 156 miles through it in the MDS. Here's what it's like to run this infamous race.

Climbing Mount Kilimanjaro – Africa's highest summit – is hard enough. Find out what happens when you start this adventure after running a marathon just before!

Namibia is home to red sand deserts, striking landscapes, and more adventures than you can count. Find out what it's like to explore this magical country.

When you start a marathon at Everest Base Camp, it's bound to be epic. Find out what it's like to run one of the world's most extreme adventure races.

When you're ultra training in Cappadocia, somehow it doesn't even feel like work! Until you start to melt in the extreme heat, that is.

Have you ever been in a race that felt like it would never end? Try having that experience after 130 miles and +27,000 feet of elevation gain.

Sometimes you set yourself up for success, and other times you do the opposite. In retrospect, the notoriously tough Brazil 135 wasn't the best time to wing it.

Racing extreme distances in foreign environments, you learn that 'kit lists' are your best friend. I wished I'd looked at the one for Borneo TMBT sooner.

Bagan is a perfect place to get lost. Every road takes you past ancient pagodas, like wandering through history. Just be ready for extreme heat on the journey!

By the 120th mile, I was ready to be done with hills. Unfortunately, the last 13 miles of the Badwater 135 are all uphill on the slopes of up Mount Whitney.

If you ever want to experience the camaraderie of ultrarunning, just join a crew for the Badwater 135. Your runner will be eternally grateful too!

The Badwater 135 is one of the world's toughest races. Find out what it's like to run this scorching race, which starts in Death Valley (in July).

Find out what it's like to be on weather hold in Punta Arenas, waiting for a flight to Antarctica to race 50 miles in the White Continent Marathon.

Patagonia is a runner's dream! Find out what it's like to run (and scramble) the trail to one of the most scenic mountain huts in all of Argentina.

The Namib Desert is a place that thrives in the transition hours, when the sun rises and sets each day. Discover what it's like to explore this majestic region.

The Brazil 135 isn't an ordinary ultra, and it demands extraordinary training. Find out why one runner trained for this extreme event in the Atacama Desert.