Here’s a number of clubs and organizations you can check out to find hillclimb events in your area:

Notes:  King of the Hill strongly advises against participating in AMA-sanctioned events – some of these clubs/organizations may offer both AMA and non-AMA events.  So be advised.  Also, many of the pro events will have amateur and/or semi-pro classes as well…so be sure to check out the info on each event to see the complete list of options.