A lot of high speed events are called driving schools for insurance coverage purposes.Limited passing opportunities,no prize money or trophys and no declared winners. 
Still lot's of oportunities to test you and your car's skills and always lot's of fun.
I think most insurers will void your coverage if you partisipate in actual races but I beleive Performance Driving schools are allowed.
Best to check with your insurer to be safe.
RD
