The document summarizes a GRC workshop from June 22-26, 2015 focusing on the geology and geothermal features of Yellowstone National Park. The workshop will include tours led by experts of the volcanic history and hydrology of Yellowstone, as well as visits to geothermal power plants. The cost of the workshop is $1,500-$1,700 per person depending on GRC membership, and includes transportation, accommodations, meals, and materials. Additional costs such as flights and some meals are not covered. Registration must be completed by June 12th, and cancellations before May 22nd incur a $100 fee, with no cancellations allowed after that date.