My family was there too. As we approached the end of the trail, we heard a low rumble. On a geocaching website, I read that you'll hear occasional avalanches. I figured that's what we heard. Enjoyed the caves for about 30 minutes, being careful to remain a respectful distance from the cave entrances, especially considering we had our 16 month old daughter with us.

We left and were just approaching the trailhead when two young men ran by mentioning the accident as they went for help. They asked my father-in-law in the parking lot if he had a CB in is RV, which we didn't.

On our way home, we saw all the emergency responders on their way up to the scene.