July 3, 2014
Greensfelder is pretty meh, as is every trail in the St. Louis area. Despite plenty of great potential and a relatively wealthy population, the St. Louis area actually doesn't have a single dedicated mountain bike trail. Pretty amazing really. The GORC organization does seem to have become fairly organized over the past few years, the trail systems are relatively well documented which is a sign of a maturing mtn biking community in the area.
Greensfelder has a few shortcomings. The biggest issue is the horses. Mountain bike trails and horses do not mix. The horses are horrible for the trials under the best conditions and most equestrians will happily ride in poor conditions. The horses make "connection" points or popular areas a general mess. Greensfelder isn't really a mountain bike trail, it's a trail that people happen to ride mountain bikes on (as are all trails in the St. Louis area). GORC has done a good job with a few reroutes here and there but there's still a lot of work to do. Goal #1 should be separating the equestrian trails from the mountain bike trails. Goal #2 should be flow, Greensfelder doesn't really have any. For people visiting the area that do a lot of mountain biking, it's important to note that, despite the reviews, Greensfelder is not technical. There's one 10 yard section that could be considered 'black' (~ monkey's head) but everything else is green/blue. 90% of the system would be green.
If I was visiting with limited time, I'd put Greensfelder at #3. I'd visit Castlewood first and Chubb #2. Castlewood is even less technical but has decent flow from time to time. Heading back to Castlewood's Cedar Bluff Loop (through the tunnel) is worth it even though it is typically overgrown and some sections are in desperate need of rerouting. Most of Castlewood hasn't been rerouted since the time of the dinosaurs. Chubb is fun and difficult but a relatively short, down and back style trail. Certainly the most challenging of the 3. If you're looking to lay down miles, Castlewood. If you're looking for technical challenges, Chubb. If you're looking for miles and don't mind horses, Greensfelder.