8 years ago, with World XC spots on the line, the action in Boulder was legendary as all of the Colorado greats - Culpepper, Goucher, Torres and Ritz - battled. What's in store in 2015? Chris Derrick goes for the three-peat but he'll have plenty of competition in the form of Ben True, Dathan Ritzenhein, Maksim Korolev, Ryan Vail and Garrett Heath.

Boston champ Meb Keflezighi is the big American name in New York and he'll be looking to keep the momentum going after his unbelievable win in Boston. Ryan Vail (2:10:57 pb) and Nick Arciniaga (2:11:30 pb) will be looking to battle Meb for top American honors alongside debutants Luke Puskedra and Aron Rono.