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Every year the Sierra experiences a different transition from Winter through Spring into Summer conditions. Every year there is a different pattern of "overlap" between the seasons, with bits of warm happening early, and bits of snow and rain happening late.
TRAP 1> These are the times backpackers get, "caught-out," when "unexpected" conditions exceed their gear or fitness or capacity to take cold while exhausted. These are the times when miscalculations converge.
Watch Out for the Green Water
Do not drink, or allow your animals or children to drink from or play in water containing cynobacteria, otherwise known as toxic blue-green algae. Review the information below and at the bottom of the page for identification and safety information.
Rising heat and declining waters are creating conditions even more favorable for cynobacteria,otherwise known as toxic blue-green algae.
I always say that "everything will happen to you on the trail if you are on the trail long enough."
I've added another "happening" that was harrowing but informative. I frigging caught on fire. Let me set the scene.
An informative article from Debra Bird's fine site,
Everything you need to know: Poison ivy, poison oak, poison sumac,
Earth-Sky, June , 2015.
High Sierra backpackers don't encounter much in the way of poison plants up high, but we can run into poison oak in the foothills.