From the airport, you can either head south into Ft. Snelling State Park, go through the park on the bike/hike trail and come out in Minnehaha Regional Park, cross the Mississippi on Ford Parkway and work your way from there, or (Best route) cross on the Hwy. 5 bridge, get on the Shepard Parkway bike trail which will take you all the way into downtown St. Paul. Get on the Bruce Vento Trail to the Gateway State Trail, and just keep going. At the current northern end of the Gateway at Pine Point Park, take the county roads to to the north/east. They are adding on to the Gateway, and it will eventually go past the Osceola crossing, all the way to Taylor's Falls, but I think that won't be done until 2014. Traffic on MN Hwy. 95, which parallels the St. Croix River can be moderate to heavy, particularly on summer weekends. Either way, the Gateway Trail is your best bet for the 24 miles from St. Paul to Pine Point. Expect plenty of bike, skate and hiker traffic on the trail in the summer, but no motorized.