click competition tracker...it gives the name, address, and contact info. Click the upper tab showing "Ranges" and it will give the range type and matches; Highpower :includes 600yd "Midrange" (since 200yd is shortrange and 800yd-1K is Longrange)
Edit: it came off snarky, but click the links on the CMP page. Email or call the match director to see what events they are doing