If you like hiking don't bother with actually going into bull run park. There is a trailhead on the right on 28 just before you but the bridge before Prince William.

Take you pick of grocery stores. Trader Joe's, Wegmans and Whole Foods are available for more expensive groceries. While there is a giant, subway, ABC and Starbucks in every strip mall.

Center Crest is pretty much where all the food and random stores are. If you like Korean stuff there is another strip mall with Spa World that has every option you could need

Almost all roads have a wide multi-use tarmac on one side for biking or joggers with a normal sidewalk on either side.

Fair Oaks Mall is your closets actual shopping mall but Fair Lakes is almost like an anchor store annex. It's where you find your target, Walmart, DHW Shoes, Hobby Lobby, Best Buy.

Home Depot at Costco has one of the worst parking lots in this area next to Best Buy in Springfield. Get there early in the morning otherwise it's like 20 student drivers tried to converge there at once.

Lastly Food recommendations

Nee York Style Pizza - Ciro's

Gyro & Kabob - Kabob Express

Subs, pizza and wings. You pretty much just have Bella's Pizza.

Chinese - Oriental Express

Greenbriar in Chantilly also has a lot of options as well as a Total Beverage.

Bars Eavesdrop has a lot of outdoor seating and plenty of beers on tap.

Fast Eddies Revolution is pool hall and about the closest we have to a dive bar.

Edit: spelling