And just like that, RMI Aconcagua Expedition, led by Mark Tucker and Pepper Dee, is off! We enjoyed our last breakfast in civilization this morning, and then before we knew it we were piling out of the van at the Vacas Valley trailhead and heading uphill under the blazing Argentine sun. We wound our way up the valley for about five hours, taking breaks to hydrate and generously apply sunscreen. Having settled in to our first camp at Las Leñas, tonight we were treated to a mouth watering traditional asado dinner by our support team of mule drivers. The team is adjusting rapidly and successfully to the demands of life on the trail, and look forward to tackling another stretch tomorrow. Stay tuned for more climbing (and more steak!). RMI Guide Mark Tucker