Summerdale is an older community consisting of mainly single-family row houses along with apartments and dual-family homes. Most of the area is relatively well-kept, but the area does have a bit of a higher crime rate. While there are plenty of sidewalks, there isn't much in the way of green spaces beyond people's yards. If you do go walking early in the morning or late at night, you should go with another person for your safety. There are plenty of shade trees to help keep you and your pooch cooled down when the summer weather is hot.
Speaking of the weather, the average temperatures in the summer are typically in the upper 80s which can make going for a walk during the heat of the day a bad idea. During the peak of summer, you should try to plan your walks for earlier in the morning when the pavement has had all night to cool off.
If there was to be a picture in the encyclopedia of boring terrain, you might just find it to be one of Summerdale. The lay of the land here is relatively flat and paved and the sidewalks run alongside the streets without any grass to separate you from the traffic. While this type of terrain might not seem very challenging, the fact that it is so flat can make it much easier for you and your dog to go for walks. The trick is to always go walking during the daylight hours and choose different directions and blocks to walk around, just to keep things interesting.
To the southwest, there is a small park with grass for your puppy to play around on. Beyond this, if you want wide open places to walk your dog and play with them, you will have to go for a drive as there are a number of great dog-friendly parks nearby.
When you live in a concrete jungle such as Summerdale, just about anything that isn't concrete or pavement could almost be considered a greenway which is something you are going to have a hard time finding here. The only things even close are the Houseman Playground and the Har NEBO Cemetery and Monuments. However, you should double-check to make sure you are allowed to take your pooch for walks in the cemetery before doing so.
There are two big parks close by, the first being Wissinoming Park over in Wissinoming or the Tacony Creek Park. Both offer plenty of green areas to play around on, trails to hike along, and shade trees to hide from the sun under. Beyond this, you have to drive quite a way to find more greenways for the two of you to enjoy such as the Wissahickon Valley Park with plenty of long trails under the trees to explore.