I think you'd be hard pressed to find a path where the boom cone's carpet doesn't pass over a moderately populated area and can be navigated by the aircraft at

I think you'd be hard pressed to find a path where the boom cone's carpet doesn't pass over a moderately populated area and can be navigated by the aircraft at supersonic speeds. The US is not sparse east of the Missippi, which is more like 750 miles from the coast.