Chuck, get a bike (and a helmet) I love riding downtown - I see parts of the city that most people miss, there is such variety - terrain, sites, sounds.., there are lots of great obstacles.
One of my favorite spots is 7th street. Here are the docs along the side of the Trading Post warehouses.
Here's how it goes:
Come across a vacant parking lot - over a curb - up a loading ramp - then drop off the dock - down to the next dock - down the stairs 
and into the parking lot.
and into the parking lot.Or - another warehouse:
Up a ramp down the side of the bldg - tight turn - pick up speed - hop up onto a wooden bridge connecting 2 docs - off the bridge and immediately down a set of stairs. How fast can you make it through?
