Siskiyou Mountains, Oregon Whitwater Rivers Klamath River Class II - 48 miles long (Iron Gate Dam to Sarah Totten Camp Ground) Siskiyou County Rogue River Class II-IV - 2 miles long (Above Nugget Falls to Gold Hill Boat Ramp) Jackson County Shasta River Class III - 6.8 miles long (Highway 263 bridge to Klamath River) Siskiyou County