ya north porltand is pretty flat. we live in se and man hills everywhere. Powell butte rocky butte Powell butt. we did the Canby loop a month ago on our tandem it ended up being 3000 feet of climbing in 42 miles lots f up and down. hills behind my house I can get 1000 feet in a mile and a half. we even manage 20% grades on our e tandem for a block or so.