We built a fun DH trail at spirit a few years back that's really fun to ride, but you have to hike back up the hill after which sucks. Also, behind the zoo there are some trails, but they might have been taken down by the superior hiking trail people. Look around on the morc forums
My buddy rides in duluth, and he said hes found some good trails, ill show him that website... I just bought a P2 and have been having a lot of fun in MQT, we got some really gnarly trails. The MM lift was running all this weekend, and theres some sick trails out there too.