UPDATE: Course surfaces are lumpier than hoped. CX bikes with 40C or larger tires or MTBs with light 1.95 or 2.0 tires are recommended. Hardtail 29ers will probably roll more smoothly than cyclocross or gravel tires but it remains to be seen which eill be faster. The course much hillier. than a suburban cyclocross course. With nearly 300 ft of elevation gain per lap, you may need gearing of 34x32T or 39x36T to sit down and feel comfortable on the climbs at the end of the circuit.