Near Anchorage, the 50km Kincaid Park Trail system for mountain biking where you may see some moose. It is built over old glacial morraine. There are miles and miles of fast double track trails that go up down and all around. Nothing very technical but very fast ant fun. An interconnected maze but maps are available sometimes at the visitor center.
Kincaid Park is located southwest of downtown Anchorage and the airport.
To reach mountain biking at the trailhead go west to the end of Raspberry Road to the park.Can also be reached off Jodphur Rd at the west end of Dimond Blvd. This is a different trailhead with access to more trail.
Overall, Kincaid Park Trails is the 2nd most popular mountain bike trail of all 26 mountain biking rides in Alaska.