I highly recommend Diamox, as do many others on this forum. I live near Long Beach, CA (40'), and last year I spent a night Lone Pine (3700'), a night at Outpost Camp (10,300') and a night at Trail Camp (12,000') and summited with no problems save a very slight headache. I believe this was possible from the Diamox.

"Come and Let Us Climb the Lord's Mountain!" -Isaiah 2:5
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