Pre-race jitters

Racing in my first 24 hour mountain bike relay on Halloween. It's actually 25 hours because of the time change. I'm on a corporate team with 10 other people so training and endurance shouldn't be an issue since I'll only have to do about 3 hours of riding, but there will be some night riding involved and I'm not familiar with the course. Hope to pre-ride Friday afternoon. I'll let you know how it goes.