01 Silverado with almost 280k. I change the oil on a regular basis, and the water punp that died after 100k. Other than that hasnt given me any problems.
Houston Valley is pretty good nothing extremely challenging but real fun. If you ever get a chance maybe go up to Moto Mountain park in Fairmount, GA. Its got everything from trails for kids (peewee track) to hill climbs that are really steep as well as a great staff. For comparison though...