In 1997, Adams experienced two slides seven weeks apart that were the largest slides in the Cascades, ignoring the catastrophic landslide eruption of Mount St. Helens, since a slide that occurred on Little Tahoma in 1963. The first occurred at the end of August and consisted of mainly snow and ice with some rock. It fell from a similar location and in a similar path to the slide of 1921. The second slide that year occurred in late October and originated high on Battlement Ridge just below The Castle. It consisted of mainly rock and flowed three miles down the Klickitat Glacier and the Big Muddy Creek streambed. Both slides were estimated to have moved as much as of material.