I'd say, jump in. It's a lot of fun. When in doubt, dismount and run it. The skills come gradually. Practicing on your own never pushes you as hard as a race and there is something about knowing a course that is great. I get lapped all the time. Many times, I will race the cat 3 and 4 race because it is later in the day (even if I am dead last), so I can pre-ride the course a couple of times. If you are going to the Red Shedman race, go to the women's clinic at 9:30AM.
PS: If you have bottle cages on your bike, I would suggest that you remove them for the race. If you carry your bike, you need to be able to put your arm through the triangle so that the top tube ends up resting on your shoulder.



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