For any serious trip abroad I use OSMand (but only on Android) ... you can use hiking routes (GPX), all offline (great if you have no phone signal). Also helped

For any serious trip abroad I use OSMand (but only on Android) ... you can use hiking routes (GPX), all offline (great if you have no phone signal). Also helped me more than once for parking or finding the next public toilet (haha). You can even using for skiing, biking or navigation on the water. And regarding elevation it seems it is also there inside: https://github.com/osmandapp/Osmand/issues/1795 https://github.com/osmandapp/Osmand/issues/1795