Terry,

I'm using a Leica CRF 1200, it's only good to about 1000 in bright sun, and I've hit 1300+ on a cloudy day.

One of my neighbors/shooting buds has a PLRF-10, it can reach out there well beyond a mile. I think it goes to 3000, maybe more. So some of the distances were already known.

I've used online mappers and GPS to measure some long stuff too.