ANCHORAGE, Alaska — The 2010 Iditarod Trail Sled Dog Race is turning into a two-man contest between former champions Lance Mackey and Jeff King.

Defending champion Mackey was first to the Alaska coast, reaching Unalakleet (YOU'-nah-la-kleet) at 3:32 a.m. Sunday.

After resting just more than six hours, he was off again, on his way to Shaktoolik 40 miles away.

Mackey left with a 28-minute lead over four-time champion Jeff King, who reached Unalakleet at 6:29 a.m. and left after resting 3 hours, 47 minutes.

Unalakleet is 269 miles from the finish in Nome. The 1,100-mile race began in Anchorage.

Huff Neff and Hans Gatt also reached Unalakleet on Sunday morning.

For reaching the coast first, Mackey won a gold cup and $2,500 in gold nuggets.