From the Cedar Ridge Nature Preserve Official Website:
The Cedar Ridge Nature Preserve is a scenic, rich in wildlife, slice of hill country. Formerly the Dallas Nature Center, the preserve spans 600 acres between Mountain Creek Parkway and FM 1382, a short 20 minutes from downtown Dallas. The natural habitat is jointly owned by the City of Dallas and Dallas County and features native trees, grasses, and wildflowers, displaying the natural beauty of the area. We’ll start with the Cedar Break Trail, a 1.9 mile hike rated moderate difficulty.

What you should bring:
Comfortable shoes that you don’t mind getting dirty
Water
Appropriate clothing for the weather

Important:
Please use the address on the event page. Some GPS will route you to Cedar Ridge Park, which is close by but not the actual hiking spot . You want the area off Mountain Creek Parkway