Across the road the trails are more hills and less mud. The trails on the same side of the road as the office is where the mud trails are located. Hopefully they've got better signage up now, but you will still have a blast!
I've been a couple times. It's got something for everyone. I got my Talon stuck in a 4ft deep mud hole! There's some serious mud holes at that place. It's a great place to ride!