I visited the Alpenrose velodrome (RIP) in Portland a couple times to watch races, but never rode there. I raced for several years at the Marymoor/Jerry Baker Memorial velodrome in Redmond, WA. Enjoyed it a lot, had the skills to get a class b (cat 2) license, but only had the legs for cat 4, where I ended up placing top 5 pretty regularly, but saw one too many life-threatening crashes, so I sold my track bike and bought a better SLR camera.

On a related topic, it appears that the US has 21 velodromes, and NZ (where we went on vacation this spring) has 19, much better per capita ratio.