 KLCC FM Public Radio | Dozens head towards Riddle to search for Cycle Oregon volunteer Mark Bosworth By Lynne Terry, The Oregonian Lynne Terry/The OregonianDozens signed up outside the Sheraton near PDX this morning before hopping on a bus towards Riddle. They will join the search for missing Cycle Oregon volunteer Mark Bosworth. ... Cycle Oregon seeks volunteers to help find Mark Bosworth Search crews looking for missing Portland cyclist Portland Man Missing from Cycling Event |