[voakbasda]

Even if you managed to get it to plan a smarter path, steep terrain usually requires bigger motors, aggressive tires, all-wheel drive, and better suspension. Even my big riding mower becomes useless on a hillsides or small depressions when even the slightest dew or rain slicks up the grass, and I still manage to get it stuck occasionally on the dry days.

[ZeroGravitas]

I've seen workers operate mowers on hillsides via ropes from the top.

The idea of a little robot mower "mountain climbing" by hooking a spike into the ground and using a pulley amuses me.