People cross country skiing on the Tony Knowles Coastal Trail near Earthquake Park with Anchorage skyline in the background, Cook Inlet, Southcentral Alaska

Man cross country skiing on the Tony Knowles Coastal Trail near Earthquake Park with Anchorage skyline in the background, Cook Inlet, Southcentral Alaska

A young woman stands with her studded tire bicycle amongst the ice chunks in the Cook Inlet next to the Tony Knowles Coastal Trail, Anchorage, Southcentral Alaska, USA.

A young woman rides her studded tire bicycle amongst the ice chunks in the Cook Inlet next to the Tony Knowles Coastal Trail, Anchorage, Southcentral Alaska, USA.

A young woman rides her studded tire bicycle amongst the ice chunks in the Cook Inlet next to the Tony Knowles Coastal Trail, Anchorage, Southcentral Alaska, USA.

People cross country ski and skijor with an Alaska Husky on the Tony Knowles Coastal Trail near Earthquake Park with Anchorage skyline in the background, Cook Inlet, Southcentral Alaska

People cross country ski and skijor with an Alaska Husky on the Tony Knowles Coastal Trail near Earthquake Park with Anchorage skyline in the background, Cook Inlet, Southcentral Alaska

Two people cross country ski and skijor with an Alaska Husky on the Tony Knowles Coastal Trail near Earthquake Park with Anchorage skyline in the background, Cook Inlet, Southcentral Alaska

Young woman with her bicycle stands on frozen ice chunks along the Tony Knowles Coastal Trail, Anchorage, Southcentral Alaska

Young woman with her bicycle stands on frozen ice chunks along the Tony Knowles Coastal Trail, Anchorage, Southcentral Alaska

Young woman with her bicycle stands on frozen ice chunks along the Tony Knowles Coastal Trail, Anchorage, Southcentral Alaska

A young woman stands with her bicycle on ice next to the Tony Knowles Coastal Trail, Anchorage, Southcentral Alaska, USA.

Aerial view of two tug boats sailing on the silty waters of Cook Inlet in late evening sunlight casting long shadows over the bow of the boats in winter, South-central Alaska; Anchorage, Alaska, United States of America

Snow-covered downtown Anchorage with the Chugach Mountains directly in the background and Cook Inlet in the foreground, South-central Alaska; Anchorage, Alaska, United States of America

Aerial view of the Conoco Phillips building in downtown Anchorage, snow covering the park strip in the foreground, Point MacKenzie in the background in winter, South-central Alaska; Anchorage, Alaska, United States of America

Aerial view of snow covering 3rd and 4th avenue in downtown Anchorage, the Sheraton Hotel building rising up with the Chugach Mountains in the background in winter, South-central Alaska; Anchorage, Alaska, United States of America

Aerial view of snow covering the the sea ice on the frozen shores of downtown Anchorage, the Chugach Mountains in the background beyond the office buildings and hotels in downtown Anchorage in winter, South-central Alaska; Anchorage, Alaska, United...

An Alaska military cargo ship in Cook Inlet, Anchorage, Southcentral Alaska, Winter