This was up there with being one of three most difficult multi day treks I have done, especially the first day which had 1400 meter elevation gain, but the experience was amazing. Wilderness camping in not allowed in the Julian Alps so you have to stay in huts. The huts were minimal and one didn't have plumbing or running drinking water but the beds were comfy, rooms were clean and food tasty.

My route:

Day 1: Vrsic pass to Pogačnikov dom na Kriških podih. About 6 miles. 1400 elevation gain. Several technical spots that require use of cables and support beams.

Day 2: Pogacniko Dom to Koča na Doliču. About 6.5 miles. 1400 elevation gain (more gradual than day 1). This was the most beautiful day as you ascend over a ridge you then have a beautiful descent surrounded by wildflowers (I went in July) and Mt. Triglav views. Koča na Doliču is a very remote hut and the toilets are essentially outhouses with holes in the ground but the beds were comfy and the service was phenomenal.

Day 3: Koča na Doliču to Koča pri Triglavskih Jezero. This day was easy. After an initial incline it is a gradual decent into the beautiful Lakes area. Saw lots of Ibex, marmots, and a deer. The hut is much bigger than the other two and has more accommodating facilities and is up against a beautiful lake.

Day 4: Koča pri Triglavskih jezerih to Lake Bohinj. After a quick initial ascent you have a long pleasant hike out of the Julian Alps to beautiful lake Bohinj. You pass by a lot of cute rustic lodges and cows. I immediately swam in Lake Bohinj once I reached its shores.