Not a huge park, but bring a lunch and you can spend about 2 - 3 hours here. The actual mine your walk down was an awesome experience (bring a sweatshirt, even on the hottest day), I would say for all ages 5+ highly recommend. Light hiking in the area and a small gift shop and museum. Blacksmith open on select days.
Short 15-20 minute self guided tour. Was a lovely 58 degrees inside the mine even when it was 90 degrees outside. Was a cool experience. Cost is reasonable.
Amazing experience. My favorite part was going into the mine tunnel. It was chilled, dark, and dripping with water. IT WAS GREAT.Tour guides (Stamp Mill/Black Smith Shop) were excellent too! I definitely recommend visiting this location. The fee is $12 per adult, $10 for veterans.