I sometimes travel solo to National Parks. As I get older, I am realizing that I need to stick to popular trails where there will be other hikers, or join an organized hike with a ranger. I have had several incidents over the years hiking solo where I have fallen or gotten lost. Looking back on them, I am surprised by how much risk taking I did when I was younger.
Think about organized tours or ranger led hikes. That being said, I find that I have more fun traveling solo in cities than I do hiking solo in a National Park. Sometimes those National Park trips get a little lonely. I always find fun people to do stuff with in cities.