Willow, Alaska in the context of "Matanuska Valley"

Matanuska-Susitna Valley (/mætəˈnuːskə suːˈsɪtnə/; known locally as the Mat-Su or The Valley) is an area in Southcentral Alaska south of the Alaska Range about 35 miles (56 km) north of Anchorage, Alaska.It is known for the world record sized cabbages and other vegetables displayed annually in Palmer at the Alaska State Fair.It includes the valleys of the Matanuska, Knik, and Susitna Rivers.11,000 of Mat-Su Valley residents commute to Anchorage for work (as of 2008).It is the fastest growing region in Alaska and includes the towns of Palmer, Wasilla, Big Lake, Houston, Willow, Sutton, and Talkeetna. The Matanuska-Susitna Valley is primarily the land of the Dena'ina and Ahtna Athabaskan people.

The valleys are shaped by three mountain ranges: the Alaska Range, the Talkeetna Mountains and the Chugach Mountains. The Matanuska-Susitna Valley was carved by glaciersleaving thousands of lakes.The Mat-Su rivers and lakes are home to the spawning grounds of chinook, coho, sockeye, pink, and chum salmon.The area is home to 31 state parks and campgrounds.

The Iditarod Trail Sled Dog Race, more commonly known as The Iditarod (/aɪˈdɪtərɒd/), is an annual long-distance sled dog race held in Alaska in early March. It travels from Anchorage to Nome. Mushers and a team of between 12 and 16 dogs, of which at least 5 must be on the towline at the finish line, cover the distance in 8–15 days or more. The Iditarod began in 1973 as an event to test the best sled dog mushers and teams but evolved into today's highly competitive race.

Teams often race through blizzards causing whiteout conditions, sub-zero temperatures and gale-force winds which can cause the wind chill to reach −100 °F (−73 °C). A ceremonial start occurs in the city of Anchorage and is followed by the official restart in Willow, a city 80 miles (129 km) north of Anchorage. The restart was originally in Wasilla until 2002, but due to too little snow, the restart has been at Willow since 2004. The trail runs from Willow up the Rainy Pass of the Alaska Range into the sparsely populated interior, and then along the shore of the Bering Sea, finally reaching Nome in western Alaska. The trail is through a rugged landscape of tundra and spruce forests, over hills and mountain passes, across rivers and even over sea ice. While the start in Anchorage is in the middle of a large urban center, most of the route passes through widely separated towns and villages, and small Athabaskan and Iñupiat settlements. The Iditarod is regarded as a symbolic link to the early history of the state and is connected to many traditions commemorating the legacy of dog mushing.