The Z car club of CO is hosting a track day, $165 for non members of the ZCCC. Since it's late notice you'll have to Tech onsite for another $10 (most likely) and show up early. There are 4 run groups and hired workers so this equates to a lot of seat time. Regular and race gas (both expensive) and food onsite.
Registration and Tech forms (bring it onsite at this point, with a check) are here
Colorado Z Car Club