Well, out of our group of 9 that made it to Ice Lake, only 3 made the additional trek up to Island Lake. It's not a bad hike from Ice Lake. It took us about 25 minutes from Ice Lake. It's elevation is about 300' higher than Ice Lake. It's worth the extra energy/time if you have it. Another hiker had told us that there is a less traveled trail that makes a loop and comes back to main trail just below the meadow. We didn't try it, just backtracked. Wish we had a trail map.