Gas Money. Showing the size of the pot as the season goes on, may inspire some to keep going. Quick race summary, maybe an interview with the weekly winners and a couple pictures each week on the series web site. Not everyone is going to win, but they may just get into the summary for being aggressive or whatever. For me, racing is just fun but I'll admit that as the year goes on and there's a chance at doing well in the points race or team race, it gives a little extra motivation to keep going in August and September.
We're dreaming right? Local TV coverage, food and a playground for the kids to hang out on, maybe some shade and a course that spectators can get excited about going to because they can see most of the race. The more spectator friendly and convenient, the more people will want to come out and bring their families.
Good luck. Is this a series in Boise?