If a day on the water is not your thing, there are plenty of other outdoor spaces to enjoy where you can hike or bike. The Hopewell Riverwalk is a great place for a leisurely stroll along the boardwalk. Part of the regional Appomattox River Trail, a project of the Friends of the Lower Appomattox River (FOLAR), the Riverwalk is 3/4 of a mile long. There you can watch ospreys fishing, eagles flying, and some of the best sunsets around.
As mentioned above, Appomattox River Regional Park is a great place to walk, run, or bike. Appomattox River Regional park offers over 65 acres of pristine woods on the Appomattox River. It features over 3 miles of hiking trails, birdwatching, picnic pavilions, an observation pier, fitness trail and restrooms. Pick up a trail map at the Hopewell/Prince George Visitor Center.
A little more remote is the James River National Wildlife Refuge. The large refuge contains several trail loops with many excellent wildlife observation points. They also have a canoe/kayak launch, but it is not yet open to the public. Bear in mind when visiting this park dogs are not allowed.