There will be a arenacross at the Hale arena in Kansas City Feb 15-17. They are having a pitbike class on fri and sat night. I have been to it the last 2 yrs and it is alot of fun. It is a combined class (50s & 110s together). Last year they had about 15 riders I think.
Missouri State Motocross - Hale ArenaCross Feburary 15,16 &17th