Hot answers tagged alps
tl;dr What you describe is absolutely allowed (using a bivouac to spend one night). If you set up a small camp (described as a "planned bivouac" further in this text), you shouldn't be in a protected area. Bivouac Wikipedia Sleeping one night without a tent or a small igloo. An emergency bivouac is basically allowed everywhere. A planned bivouac ...
With the information on the website and g00gle maps, I think the whole parcour should be between 1500m and max. 1600m.
I was there a few days ago. The highest point of the 3D course was 1800 m and starts at 1600 m. Most of the hiking trails however go up to nearly 1900 m and one is even close to 2100 m.
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