The Portland Doubletree is adjacent to the MAX light rail system which is fareless to most downtown locations and costs just $2.05 each way to the airport, which is 15 minutes away.
The fabulous Lloyd Center Mall, featuring over 200 stores, 18 movie theatres and an ice skating rink is just across the street.
The Oregon Convention Center, the Rose Garden Arena and Memorial Coliseum are walking distance, and The Oregon Museum of Science and Industy and Washington Park Zoo are nearby.