We just returned this afternoon from our hike and I will try and post a more detailed trip report in the next few days but here is a quick update.
@WasatchWill and others - thanks so much for your advice. We went with our original plan and headed to Naturalist Basin and it was an excellent decision. We hit the sweet spot of excellent weather, still some snow around to make photos interesting, some nice wildflowers popping out, very few bugs (the breeze might have helped that) and also very few people. Things are melting very quickly up there - here are few photos taken at similar spots to
@WasatchWill's above two days later (Friday 6/19).
When I got back and checked this post I noticed that we had unintentionally camped in the same location as
@WasatchWill did. No ice on the lake now.
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As we walked up to the shelf, this is the view back to the Morat Lakes - both ice free.
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We took his advice and climbed up to the divide between Naturalist and Middle Basin for 360 degree panoramic views. Many of the lakes on the shelf have lost or are not far from losing their ice too. This photo taken on the way up is looking down to WalcottLake, Blue Lake to the right just out of view is still mostly ice but with a ring of water at the edge. It is similar for Le Conte, Faxon and Shaler Lakes. The snow is disappearing fast too and we didn't have to posthole much at all.
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We also explored around the shelf past Le Conte Lake to overlook Jordan Lake which is now almost 100% ice free.
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Another thing to mention - when we were hiking in we met a couple coming out and they had camped at Evermann Lake below Jordan Lake. They said the stream crossing to go this direction was just below their knees. I would imagine that it would be best to cross in the morning like they did. With the snow melting in this warm weather the waterfall above Morat Lakes had much greater flow in the afternoon than the morning.