Gravel starts shortly after leaving Ljubljana and after that there is almost no traffic exposure. Surface is mostly excellent, with a few slightly rougher bits but nothing special. Rode it on 45mm tires, but it can easily be done on narrower. The very final bit towards the mountain hut gets a bit rougher but you can easily walk if needed since it's less than 100m. Thre's a view of Ljubljana from the top. Climbs are mostly mellow and steady, and the descents are some of the best around Ljubljana in my opinion.
Creator's personal assessment (not the community rating).
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