It's not the tallest tree in the park. That title is claimed by Stratosphere Giant. The tallest redwood currently known is Hyperion in Redwood National and State Parks.
Supplemental (Dec 27): The Founders Tree coordinates on a
USGS topographic map (CA Weott 102418 1969 24000 geo)
are 40° 21.121'N, 123° 55.426'W.