About 500 swimmers will jump in the Columbia River on Monday morning for the 2015 Roy Webster Labor Day Cross Channel Swim.  The swim originated in 1942 when local orchardist Roy Webster challenged himself to swim across the river.  Monday morning participants will board the famous Sternwheeler paddleboat on the south shore of the Columbia at the Port of Hood River and will be ferried across the river to the Washington shore where they will jump off the boat and into the water.  A special swim lane lined with volunteers in sailboats, kayaks and paddleboards will guide, encourage, and protect swimmers as they cross the channel.  This year’s swim is sold out, but stand-by registrations to take the place of no shows will be taken starting at 4:45 a.m. Monday.  For more information, call the Hood River County Chamber of Commerce at 541-386-2000.