If you are looking for a new running route, the new Bay Bridge gives you an easy, flat, fast run, with epic views! If you park at Ikea, Emeryville, you are right at the trail head. It is exactly 4 miles to the Tower, which gives you an 8 mile round trip, there and back, run. However, no water, no shade, and no port-o-pottys, so bring a water bottle and a hat!