I've been working recently on something semi-similar for runners - calculating elevation gain, difficulty, route generation, etc. First time around I was using

I've been working recently on something semi-similar for runners - calculating elevation gain, difficulty, route generation, etc. First time around I was using Mapbox API but ran into some difficulties and have since switch to Google Maps which still isn't exactly what I'm looking for. Would be interested in learning more about your backend if you don't mind sharing - kguebert93 @ gmail.com