So negative. I ride and run in the woods near me quite a bit. It's peaceful and quiet, but the opposite side of that coin is that no one would find me for quite some time if something went sideways.
In my rural state the fastest connection I’ve ever had on my phone was in about as remote as you can get fishing a creek surrounded by 30’ embankments. Bet I was the only person connected to that tower.
In which case you will probably not have a cellphone connection anyway.