Anchorage

The Jodhpur Motocross Track is located off the west end of Dimond Blvd.  The track is Municipality of Anchorage park land and is open for free practice except on race days and the day before each race (for track prep).  Hours:  10 a.m. - 10 p.m.
 

Rival Park Motocross Track

The Rival Park Motocross Track is privately owned.  The track is located at mile 14.5 of the Old Glenn Highway.  It is open for practice Tuesdays and Thursday at 6:30 ($5) and hosts the five-race Saturday afternoon Rival Park Motocross series.
 

Twin Cities Raceway - Kenai

The Twin Cities Raceway is located on the Kenai Spur Highway between Soldotna and Kenai.  If you're headed south on the Sterling Highway, turn right when you get to the light at the 'Y.'  The track will be on your right in about 5 miles.

Polar Roller Raceway - Fairbanks

The Polar Roller Raceway is located between Fairbanks and North Pole off the Old Richardson Highway.