Musher Keith Ali at the starting line on day one of the 2006 Beargrease Sled Dog Race. The event is named for John Beargrease, a 19th-century Chippewa man who delivered mail by dog sled along the Minnesota North Shore. (Kit Larson)

Sounds from the John Beargrease Sled Dog Marathon

Musher Keith Ali at the starting line on day one of the 2006 Beargrease Sled Dog Race. The event is named for John Beargrease, a 19th-century Chippewa man who delivered mail by dog sled along the Minnesota North Shore.

Credit: Kit Larson