We did the full loop plus hiking to Merlin lake in about 13 hours and headed out the same day. A very long day with variety of landscapes from dense woods, gorgeous creeks, wide open meadow, water falls and five spectacular lakes and last but not least, the historic Skoki lodge, located deep in the isolated Skoki valley. Completing this full loop in a single day will definitely need a good level of body strength however, the beauty of the area makes you forget about your tiredness. Be prepared for rapid weather change at any time. Overall this was a very pleasant hike and I highly recommend it at least once.