BT Forum

Castlewood Canyon State Park has some great trails. It would be really close for you so I would definitely give it a try.

Awesome - thanks! I'll check it out.

Highlands Ranch has a couple of openspace trail networks, and Bluffs Regional Park south of Lone Tree has a very hilly loop with some spurs.  Also, the Douglas County East-West trail connects the above systems as well, several lots to choose from as far as parking goes...

If you're interested in anything up in the Boulder area let me know. 

Castlewood, Castle Rock and HR are all good recommendations.  Another trail that has not been mentioned is Greenland.  It's right off I-25 around Larkspur/Palmer Lake.  More info, check Douglas County open Space

We haven't lived in the Denver are for a few years but when we were in Highlands Ranch I used to head out to Roxborough State Park. They had some fun trail runs and if you headed out early, or in the spring, fall or winter it wasn't hot and there weren't a lot of users you had to avoid. The other fun quick after work run was the single track that runs along the west side of the S. Platte River in Chatfield (near the gravel pond). You could hook it up with some additional exposed trails and get in a quick 6 mile loop after a quick ride in the Park. 

Wow guys - this is great stuff. thank you SO much!! One of the hardest thinsg about moving was not knowing where to go run when I want to, um, go run.