Bummer: Lack of snow in Alaska for sled dog racing, and too much snow for caribou migration; CO2 blamed for both

Moving Day for Many Species Is Becoming More Fraught - NYTimes.com

The longest migration included in the report is the 400 rugged miles covered by some Alaska caribou. Among other threats, it may encounter problems as the changing climate brings more snow; that could slow the animals’ journey and make them more vulnerable to wolves.

2008:  Iditarod Race Feels Global Warming's Heat | Mother Jones

Just six years ago, a lack of snow forced them to move the 1122-mile-long race's start point 200 miles north, from Wasilla to Fairbanks. And even now, they have to truck in snow for the ceremonial start.