I've done DALMAC 4 times - the quad century twice, the 5 day west, and the 4 day east. Terrain is pretty much a non issue with the 5 day west other than the Wall on the 4th day. The quad century sees significant hills on days 3 and 4, but with enough space between the climbs to allow one to recover. The 4 day east is the flattest of all the routes. Appropriately, the rides attract distinct types of riders. The 4 day east and 5 day west riders are pretty laid back, very sociable, and mainly looking to have an enjoyable ride. Look for riders on these routes to take time to smell the roses! The 4 day west riders are a bit more serious about riding, and average speeds will increase a bit. The quad is composed mainly of riders who enjoy pushing themselves, and their riding buddies. Even though the terrain is a bit tougher, average speeds will be higher on the quad than the other routes.

All the routes are very well run. The only things that will stand in your way of an enjoyable 4 - 5 days of riding would be terrible weather, major mechanical problems, or being not at all prepared for the ride (mentally and physically). The icing on the cake is the ride across the bridge at the end!