Bill W4ZV - W4C/EM-047 to G/CE-001 6261 km
Bill W4ZV - W4C/WP-012 to GW/SW-002 6199 km
Barry N1EU - W2/GC-115 to G/CE-001 5383 km
Barry N1EU - W2/GC-002 to G/CE-001 5347 km
(All ATS4 - 4 watts cw to EFHW at my end)
I’m sure I’m well down the pecking order when it comes to real S2S DX.
Dave - in the SOTA Mapping Project, go to the Range page, click on the tools bar on the left, click the Show button, choose your two summits and click the Calculate button. You get distance, short path track and forward/reverse bearings. You can choose calculation methods based on a perfect sphere (accurate to about 0.5%), or choose the Vincenty method which is based on an oblate spheroid Earth, and which is reputed to be accurate to within a few millimeters on the Earth ellipsoid.
Other methods/programs/websites are of course available…