July 21, 2015: 2015 Alaska Challenge participant Andrew Kurka awaits the start of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Ashli Molinero watches a float plane take off before the start of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Muffy Davis prepares for the start of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Mike O'Neill is interviewed by the local media before starting stage one.

July 21, 2015: 2015 Alaska Challenge participant David Neumer races along Lake Hood at the start of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Mike O'Neill races along Lake Hood at the start of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Keith Winchell races along Lake Hood at the start of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Kenny Herriott races past an active airplane taxiway near the start of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Wesley Bergin races along Postmark Drive past the FedEx hangar midway through stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Ryan Kelling races along the Tony Knowles Coastal Trail during Tuesday morning's time trial. Selling completed the 9.8 mile stage, which started at Lake Hood and finished at the Kincaid Park Chalet, in 35 minutes and 12 seconds.

July 21, 2015: 2015 Alaska Challenge participant Muffy Davis turns onto the Tony Knowles Coastal Trail midway through stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Ashli Molinero pulls onto the Tony Knowles Coastal Trail midway through stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Anthony Pedeferri races along the Tony Knowles Coastal Trail in Kincaid Park as he nears the end of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Muffy Davis races up one of the final hills in Kincaid Park as she nears the end of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.

July 21, 2015: 2015 Alaska Challenge participant Ashli Molinero nears the end of stage one, a 9.8 mile time trial that began at Lake Hood and finished at the Kincaid Park Chalet.