Maps show that Bennett Butte could be accessed from Langlois Mountain Road and Bennett Butte Road from the west. However, just before the turn for Bennett Butte, county road maintenance ends and there is a gate with very unfriendly Private Property and No Trespassing signs. 

It could be that this summit might be accessed from the east starting at Myrtle Point. There may also be a closed gate some distance before the summit where there is a radio site.