Mileage can be figured as follows: Binghamton is MP 214 on the Southern Tier line, while Campbell hall is MP 66, although Hudson Jct is a little over a mile east of that, so right there is 148 miles. The Hudson Secondary is approximately another 21 miles, from "HJ" to Pelton Road, Warwick. Block Station "PELTON" is MP 84. 5, while "PARK" is at approx. MP 12.5. So doing all the math, the numbers ROUGHLY add up to 242 miles, give or take a few. That should be not too far off from the actual mileage, but is only to the "Yard Limit" sign at the east end of the RR, while MP 214 in Binghamton is pretty much at the BD diamond. This should help put things in perspective....
I know I'm getting old... My insurance company sent me only half a calendar this year!