Cottage Grove Lake is about 50 miles north of Roseburg. The Corps of Engineers drain it in the winter but it is usually rideable April through September depending on rainfall. July and August, it will be fairly busy on hot weekends, but it's not so bad weekdays. We're usually out there weeknights after the tubers deflate for the day. Look for a fat old guy behind an 18 foot Searay I/O with a Pirate flag on the tower and say hey.