Race leading mushers arrive in Unalakleet along the Norton Sound coast on Sunday, March 15, 2015.

Alaska Dispatch News
Defending Iditarod Trail Sled Dog Race champ Dallas Seavey stormed to the lead along the Bering Sea Coast. His move to the front started all the way back in Kaltag.Craig Medred,Suzanna Caldwell
Marrs was the 11th musher out of Kaltag on Sunday morning, and he’d been hopping in and out of the top 10 over the last several days. With his short-run, short-rest strategy, Marrs appeared to be setting up his team of 11 remaining dogs for a strong finish.Suzanna Caldwell

Clear and cold -- that's been the theme so far during this year's Iditarod Trail Sled Dog Race. The biting cold makes things tough for mushers, but the clear skies mean brilliant northern lights.

Alaska Dispatch News
Veteran musher Aaron Burmeister caught and passed frontrunning Aliy Zirkle enroute to Unalakleet, a town of 800 residents that's the first checkpoint along Norton Sound and about 260 miles from the finish line.  Defending champion Dallas Seavey is closing in on the town, too. Alaska Dispatch News
The 2015 Iditarod has little to recommend it in the way of fun. Maintenance is the best most mushers can manage, and the 72 mushers remaining on the course are battling the cold at every turn.John Schandelmeier

When mushers leave the Kaltag checkpoint, they leave the Yukon River and make the run to Unalakleet and the Bering Sea coast.

Loren Holmes
I want to understand the hearts of the people who run the Iditarod. What is in the hearts of the people who break their ankles, mangle their knees, peel frost-bitten skin off their fingers and finish, return home and train for a year to do it all over again in the Alaska wilderness?   Laureli Ivanoff

While thermometers read minus 10, it seemed twice as cold in the Koyukuk dog lot nestled on the banks of the Yukon River.​

Loren Holmes
While thermometers read minus 10, it seemed twice as cold in the Koyukuk dog lot nestled on the banks of the Yukon River.Suzanna Caldwell