No, you don't understand what I mean - if you don't have your mask on and are making other hikers wait for you to do such, you are being disrespectful. A 3h hike under normal conditions can become much more arduous and time-consuming if others are making you pause for them just so you can pass with them having a mask on. You should have your mask on before they need to stop by either always wearing it or having it on your chin

Then, accept that your own mask is good enough. You don't need to wait for the other person. Like sibling comments said, studies show that being outside and briefly walking by someone is not likely to result in transmission, especially when compared to being indoors with others