Ridgeline Open Space Loop
The Ridgeline Open Space Loop in Castle Rock is a ten mile hike with plenty of hills for a great workout and some nice views as a reward.
Mountain views
Mount Royal
The Mount Royal trail near Frisco was steep and very hard challenge but the views were absolutely tremendous. This was a very enjoyable hike.
Pitkin Lake
The trail to Pitkin Lake is challenging with several steep sections but the views of the valley and lake make for a great reward at the end.