Deer Lakes Park, located in Tarentum, PA, has a mixture of paved paths and dirt trails to run. The paved paths loop around the smaller lakes at the beginning of the park. It is a very scenic, flat route that consists of multiple little bridges over the lakes. You can get a little over a mile on these paths. This would be a decent place to do a threshold run. However, the paths are only wide enough to go two runners wide and there is not much shade.
The park also has a lot of dirt trails through the woods, however some them were not very well maintained and they are very narrow. I would only recommend the trails for the most adventurous runners. Overall, this park is good place to go on a lower mileage day to run the paved paths at the beginning of the park. I was not a huge fan of the condition of the dirt trails, but if you’re feeling adventurous they could be a nice way to mix things up.
Here’s the map of my run from a few days ago: