From what I understand the most important thing to do when bitten by a rattlesnake is to get to a hospital. I often go on hikes where I am a few hours walk from civilization at the midpoint of my hike.

If I am bitten, should I attempt to run back to my car in the hopes of getting to a hospital faster, or should I just try to calmly walk back?

My concern with running is that it might spread the venom faster because my blood would be pumping, but I don't know if that's really how it works.