Wonders Of First Auto Trip Around Mount Hood Many104th Street Drive-in. 1963. City of Portland.Posted by Michael Long to dead memories portland, June 2, 2015Mt. Hood Loop Interpretive Sign (2013)DETAIL:  Mt. Hood Loop Interpretive Sign (2013)DETAIL:  Mt. Hood Loop Interpretive Sign (2013)DETAIL:  Mt. Hood Loop Interpretive Sign (2013)