Twenty-five miles of nearly uninterrupted bicycle path. You heard right. That's a huge stretch of pavement without worrying about cars or 18-wheelers taking you out. True, there are often other obstacles to weave through, like pedestrians, roller-bladers, and the scourge of humankind, electric scooters. But they probably won't kill you, and if it's later at night or hot, or if you get lucky, you'll have nearly the whole trail system to yourself. Doing the math: The ride could be a 50-miler out-and-back if begun at one end. In reality, that might be difficult to do. But the beauty of this ride is you could live in south Phoenix, Tempe, south Scottsdale, or north Scottsdale and still access the trail easily for a long, no-car bike ride. There are no signs, and not even a single online map for this one. Here are the tricks (start from either end): Catch the west end of the Rio Salado bike path at about 19th Avenue and the south bank of the Salt River riverbed. Continue through the Tempe Beach Park, and connect to Scottsdale's Indian Bend Wash path by either taking the pedestrian bridge to the north side, or using the walkway on Rural Road. That path soon bends north and runs all the way to Shea Boulevard. You might want to pack a lunch.