Will running hills everyday lead to injury?

In the late 1970s, I was worried about the same thing. I lived on top of a hill and it was one mile down in any direction so the first mile was a sharp drop and the last mile was a killer climb. The middle mileage was rolling hills.

I attended a lecture given by Lydiard sometime in the late 1970s and asked him about the possibility of injury since I ran that course every day. He scoffed at the idea and told me that I was a "lucky man", i.e. that "people in NZ drive for hours to find what I had in my own backyard".

I continued to run that course every day and I set PRs at 1/2 marathon and the 10K with no injuries whatsoever. Both PRs were set on flat courses but I'm sure I could have done well on hills as well.

I have a question about our 1/2 Marathon Race for a Solder in WA. We are asking to change the course so that our runners, will now be going up a 255 feet elevation gain over .6 miles at 5.1% pitch at mile marker 2, Most of our runners are recreational and run just for the cause. From all your experiences, are asking for trouble with physical ailments by doing this or should we continue to go down the hill instead? What are the potential injuries> I heard, achilles, plantar fancia. Comment please. thank u