I recently moved to Jena and this seemed like a very nice way to explore!
Today the weather was great, I started late to get some more heat and I think that was the right decision, I didn't sweat much but I also didn't feel cold at all.
I ran slightly too fast once the trail became flat. I felt super good, it was a bit crowded but all the people were very nice and let me pass.
The views were amazing. I got the path wrong a few times but I was always able to quickly backtrack, I think I only lost a few minutes
At kilometer 20 roughly I started to ration my water - I'd brought 2L with a bunch of sugar dissolved, probably too little, half a liter extra would have helped.
The little ascent to the Fuchsturm at the end was very steep but I think my legs felt the last descent even more.
It felt fitting to return to the Marktplatz, which was full of people out and about.