Grand Teton Rockfall: Second Tower Collapses Over Fourth of July Weekend

Grand Teton National Park's Second Tower partially collapsed on July 5, 2025, causing significant rockfall and raising concerns for climbers on the East Ridge and Lower Saddle routes. The Jenny Lake Rangers are urging park visitors to exercise caution in unstable terrain as warming temps and freeze-thaw cycles increase the frequency of rockfall in the Tetons.

The Jenny Lake Rangers sent out a heads up to visitors after a major rockfall event on the Grand Teton over the Fourth of July weekend.

A large section of the Second Tower collapsed on Saturday, July 5, triggering sporatic rockfall for at least the following 48 hours, according to eye witnesses.

Courtesty of the Jenny Lake Rangers. The Second Tower from the summit of the Middle Teton, 07/06/2025

The Jenny Lake Rangers are Grand Teton National Park’s (GTNP) elite search and rescue team.

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“While we know that freeze-thaw cycles can contribute to rockfall, and such events have been observed with higher frequency in recent years, these events remain highly unpredictable. The best mitigation is to limit your exposure, minimizing the time you spend under areas that may be more prone to rockfall.

A debris field is now visible on the Teepe Glacier, and it's unclear whether the popular East Ridge climbing route has been impacted. Another large boulder was seen across the winter route to the Lower Saddle.”

Rangers aren’t sure if the East Ridge Climbing route has been affected.

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