Hi Bacana - congrats, it's a nice workout climbing up Radio Road. You're right, to replicate the race route you need to start from the other side of the hill at the corner of North Hill, by Intermune. Where did you hit your max speed? I find it very easy to hit 40 going down Radio Road, but am wary of the last turn before you come to the little grove of trees as the road surface is so poor I could easily imagine having a bad experience. The "second" descent down Guadalupe Canyon is also pretty fast, but the road surface is much better.
PS - yeah, you probably need to talk to fellow cyclists to elicit anything more than a "you're crazy" kind of response.