If your talking about the NYC Area, Some indoor tracks you can check out:
http://www.southshorehobby.com/ and
http://www.willishobbies.com in the Long Island Area.
Mini-Z indoor action in Staten Island:
http://www.actionrcspeedway.com/
Check the websites for schedule and direstions. All these places are Big fun and the action is non-stop!!
Indoor action will be in full swing in Oct.......... So Good Luck and enjoy!