The HD-YLAKE science team has converged on Yellowstone National Park for their third and final field season. While some science teams are collecting their long-term measuring instruments from the bottom of the lake, others are continuing to make new measurements. Although this is the last field season, in some ways this is less of an ending to the project and more of a beginning. Measurements in hand, the scientists will now spend months, even years, poring over the terabytes of data they collected. It’s a lot like putting together a giant puzzle, and the final picture will be a new understanding of what’s happening in the depths of North America’s largest high elevation lake. Photos by Chris Linder, WHOI. Work was completed under an authorized Yellowstone Research Permit.