Elfreth's Alley is a short alleyway nestled between the Delaware River and 2nd St. Despite being a short alley, there are no less than 32 Federal and Georgian style homes packed side by side. The area has been on the National Historic Register since 1966 and is currently one of the most carefully cared for neighborhoods in Philadelphia. Given that it is only a small cobblestoned alley, you must plan to drive to parks and restaurants. However, there are a couple of pet supply stores within walking distance. Keep in mind that living here means having to deal with tourists.
The climate here is delightfully warm in the summer with temperatures in the high 80s and low 90s with plenty of sunny days and little rain most years. Winter, however, can be quite the contrary with seemingly endless weeks of temperatures that stay well below freezing and offer plenty of snow, sleet, and ice.
The terrain in Elfreth's Alley is one short alley of cobblestones. While this sounds quaint - and to be sure, cobblestones are beautiful to look at - they tend to become very slippery when it rains or when there is snow or ice on the ground. The rest of the area around Elfreth's Alley is paved roads and sidewalks.
The only thing that mars the scenery is the massive brick wall at the east end of the alley. This wall is part of the I-95 overpass. It also cuts off direct access to the river and cuts short the amount of variance you can add into your daily walks. Keep in mind that this is a very busy area. When you are out walking your pup, be sure you keep them on a short leash and be sure you pack waste bags with you to clean up after them whenever necessary.
There is literally nothing in the way of green space along the alley or within a few blocks for you to enjoy. However, all you have to do is walk over to Race St. and follow it under the interstate.
Just on the other side of Christopher Columbus Blvd. is the Race Street Pier. Once, the pier was used by cargo ships, but today, has been completely renovated. The park is both family and dog-friendly with plenty of grass to play around on. The pier is a very popular place with locals in the area to come with their families to relax and watch the many barges and boats going past on the Delaware River.
A little further south is Spruce Creek Harbor Park which has a few small areas of grass. The best part is that you can follow the boardwalk and see Cruiser Olympia, the Submarine Becuna, and the Moshulu, a four-masted steel baroque, all part of the Independence Seaport Museum.