Amazing hike, lake view is a gem
We spent 2h to the trail end (do not stop at the lake, make it till the end, the view is fascinating)
And a bit more than an 1h to the way down as we didn’t have enough time and had to rush
I would say It is a 3 part hike, forest, open space (bring hat), elevation, the last one for sure is the difficult one, but is very manageable
4h of good pace would be the time to get to the lake, chill and enjoy, and get back