On my I-phone my record is 14 Miles hike plus 1-2 mikes that day so 16 miles approx and 32,000 approx steps. Phew that was quite a hike and was sore the next day from all the hiking and it was slippery in some places and did have trek poles for walking. 
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"Our deepest fear is not that we are inadequate, but that we are powerful beyond measure."