Bear Creek Lake Park is a City Of Lakewood park. It has a number of amenities and features, including 2 small lakes for swimming, a few lakes for boating, a golf course, quite a nice trail system (with a few cracks) for road riding through the area (on your way down Bear Creek Trail), a campground (first come, first serve), and a good 12 miles or so of singletrack (open to hikers, bikers, and equestrians). The singletrack is almost entirely dirt, but a few spots of rocks exist, although not technical.
Entrance into the park is free for bikes, fee for cars. Hikers are also free. If you are driving in and parking somewhere, free parking is available in some areas in Morrison (careful! Some spots are 2 hours only!)
I'll get some pics next time I'm over there...
Take C-470 to Morrison Road. East to your first right, which is the park entrance. You can also access the south side immediately off of C-470, just north of 285 only on north-bound C-470.
When to Bike
Most of the year. The area can be brutally hot in summer. Can be muddy after rains and snow. The area is exposed, sunny, very little shade. Water is available in some areas near the visitor center, golf course, etc.
Links & Other infoCity of Lakewood page on the park.