400' are about the records, coastal redwoods. Giant redwoods the most massive living species tho the wood is not really alive.

even if they fall over, just enough of the roots are left living and those will often sprout in large rings of new saplings, thus replenishing the species. Except for Bristlecone pines, which are very rare, and live at freezin altitudes, thus their longevities bein in a natural freezer part of the year.