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.