Yeah for sure 460 is anticlimactic. Especially considering the great roads around. I've ridden on it from 635 to Narrows to pick up 61 and it felt long. It's only 16 miles from 635 to 648 but will feel like a long way. An interesting option could be to take 100 on the other side of the river - that's only 4.8 miles (4min) on 460.