Looking for help

Myself, my wife and another couple are looking for a 3 day 2 night quick trip to do that is within a 4 hour radius from Portland OR (that we don’t need a permit for). We are new to backpacking but are in good shape so we aren’t worried about elevation, as long as we do t need mountaineering equipment. I’m guessing that it would be 20+ miles but of course it all depends on the difficulty of the trail. Thank you in advance for any help that you can offer.