Free Visitor Guide of Mat-Su Valley. Featuring Denali adventures in Talkeetna, glaciers, Iditarod headquarters, Hatcher Pass, Alaska State Fair, world-class sportfishing, wildlife, flightseeing, hiking, museums, farm tours and more. The Mat-Su Valley is located just 35 miles north of Anchorage and spans all the way to Denali State Park. Make sure you make the Mat-Su Valley your base camp for adventure while in Southcentral Alaska. You'll definitely say, "Yahoo, Mat-Su!"