Can you imagine saber tooth tigers, mastodons and ground sloths roaming nearby? Next time you run/bike/ride by Hawver Cave/Mountain Quarries Mine along the Quarry trail and the Middle Fork of the American River, make a mental note that bones from these ice age animals (along with 4 human’s bones dating back 10,000 years) were discovered here. The Cave was originally discovered in the 1880’s by miners who were looking for limestone and later in 1906 rediscovered by Dr. John C. Hawver, an Auburn dentist and paleontologist. Secured by gates compatible with bats since 2006, it’s yet another local hidden treasure. Plans are in the works to schedule limited docent led tours by the end of the year.