Yep, Chimney Gulch and Apex are some of my favs as well, love all the Jeffco trails! Wish other counties had it together like they do!
If you could navigate the rocks coming down the wall on Deer Creek, my hat's off to you - I'm pretty sure I'm too chicken to attempt that descent on my hardtail these days...maybe if I ride it more. I'm planning on doing the Red Mesa Loop first, then the Plymouth Mountain Loop. Hope to catch you somewhere on the trail, what should I be looking for in the parking lot?