Walden MX is a great facility. They have two tracks on premises. The original MX track is about two minutes long for riders and has great elevation changes, large and small jumps and a few combination sections. There are also two sets of whoops which separate the men from the boys.
The dirt is still really good even after almost 50 years of racing. There are few sections with large rocks that never seem to go away so make sure you wear your chest protector and keep your tires at 12 psi or more.
The crew does an amazing job of staying on top of the track - keeping it rough but working hard to make is safe. The motocross track is actually run by a club of riders and parents of riders so they really listen to what the riders have to say which keeps it fun and is why the track has evolved so well over the years.
The smaller track W2 hosts peewee's, minibikes and quad racing throughout the day. The track is not as challenging as the main but is still very fun for all.