What you need to know before you go.
Krar and his wife, Christina Bauer, have a long history with the land.
Run one of the Seven Natural Wonders of the World.
Check out this authentic look at Krar's remarkable ability on the trail coupled with revealing insight into his struggles.
Check out these well-known challenges that runners take on in our national parks.
Here's what it means for those wanting to do the popular Rim-to-Rim-to-Rim run.
The national park will release a new draft of its backcountry management plan this fall to deal with overcrowding issues.
High-school-age runners now have a chance to rub elbows with the elite of the sport.