What a wonderful dogpark! I love this dogpark and it is exactly what my German Shorthaired Pointer needs. There are rock outcrops for him to leap off of, terrain that keeps his mind occupied, and strenuous inclines.
This park is not one for an older arthritic pooch; my 10 year old Chocolate Lab hates it! True hikers can handle the terrain and I make sure I bring my trusty walking stick with to assist me.
My only complaint is that there is an outcropping of granite that my dog uses to leap over the fence near the south center of the park... I typically keep him away from this spot, but there was a ground squirrel that caught his interest; being a German Shorthaired, he found a way to get to it.

All in all, this park is wonderful! Bring lots of water and waste bags.

My wife and I bring our two energetic Border Collies to this park every day. We have been to various dog parks all over Colorado, and this is the best one, by far. The setting is beautiful, and the views are spectacular! Yes, the hike can be a challenge, especially if it is wet, but if you're wearing a good quality pair of hiking shoes, you should have no problem. As for your dog or dogs -- they will love the varying topography.

Beautiful park. Not a good one for older large breeds.

There is also a fenced field right next to the fenced wooded area.
Just walk a little further down the path on the right from the parking area. It's about half acre feild, great!
If you love the mountains you will love this park!
It's my favorite that I have been to thus far.
I don't have a bad thing to say.
Fenced in hiking area
Fenced in field to run
Open space trails to head out into the woods.
Awesome!

I go to this park every day with my dogs and have yet to see anyone sprawled across the ground.
Yes, the terrain is mountainous. It's in the mountains. There is a large fenced area that is a fun hike and probably more fun if you have four legs. It is very busy on the weekends but most dogs are well socialized and there are rarely agressive interactions. Some websites advertise that there is a water fountain there. I have never seen it if it exists. There is a creek that is a good 5 minute walk from the parking lot and not in the fenced area. Owners would be better off to bring their own water.

Unless you're a hiker or even if you are, this park is a bit treacherous to walk in. I think they found the part of the park that people rarely visited and made it a dog park. It is positioned on the side of a steep rocky hill. I often see people sprawled on the ground after a misplaced step. Its pretty with lots of trees and grass. Better for hiking through than walking around in.