Mystery in Rocky Mountain National Park

Amber, Jake, and Wes set out the next day for their hike to Upper Beaver Meadows and the Apache Fort. They work together to navigate and find the correct location. There, they discover a spring house, a wide meadow, and a rock face that looks perfect for an ambush. After a great deal of searching and finding nothing, Amber spots some faded writing on the rocks. The kids determine that the numbers written are coordinates for their next location. Back at camp, Wes uses a GPS to figure out that the coordinates point to Willow Park, which is eight miles away and up the mountainside. Jake suggests being dropped off at a visitor center near the top of the mountain and biking down to Willow Park from there.

Uncle Brian and the other adults agree to let the kids go through with their plan, but with the condition that the adults accompany them at a distance. The drive up the mountainside is spectacular and slightly scary, and they see some mountain goats along the way. When Jake spots a small animal that his dad calls a marmot, he is instantly reminded of the note in the box that mentioned someone named the Marmot.