Ladder Lake has always interested me so I was most pleased to find this thread. Here's a photo of Ladder Lake's outlet stream cascading into LeConte Canyon.
Doyle, I thought I could see parts of a trail to the right of the cascade--doesn't show well in photo--but I studied the scene for a long time and wondered, if that was a trail, where it might have taken off from the JMT. Do you have a map showing the trails location?
Anyhow, not too far South from the LeConte Ranger Cabin, you can look up into the hanging valley and see the cascade just below Ladder Lake. That was into the sun, so I didn't take a photo.
Thank you, Wandering Daisy, for your map. I ran across a trip account about crossing Echo Col that has photos showing part of your route and boy did that look like a taylus slog. Your knees must be holding up better than mine.