Both are repeat winners of the road race.
A day after turning 32 the Duchess of Cambridge's royal sibling, Pippa, decided to tackle the 2015 Ötillö Swimrun.
Five past champions will be racing, and it will be televised nationally.
The California couple has deep ties to east Africa.
Fernando Cabada is the top American entrant on the men's side.
Can running's marquee race rekindle some excitement in the sport?
The Olympian's double life as a Las Vegas escort will be chronicled in a new book.
The marathon world record holder goes on the defensive in strongly worded 1,700-word statement.
Seating capacity will be expanded, among other upgrades.
Could our desire to run stem from our primitive need to find food?