The McDonnell Hillslope Hydrology Lab focuses on measuring, modeling, and understanding hillslope runoff and water cycling. Our three main research questions are: Where does water go when it rains? What flowpath does it take to the stream? and, How old is the water in the channel? Our work is field-based. And over the lab's first ~20 years, the group has focused on understanding hillslope storage and release processes; and topics including hydrograph separation, streamwater transit time analysis and deciphering runoff mechanisms across diverse hillslopes and catchments. This work has culminated in recognition that all runoff processes are the same. But this body of work largely ignored what happened between events. Therefore, for the past ~10 years, the group has begun to broaden its aims by going after additional questions of what happens to water on hillslopes between events and where hillslope vegetation gets its water? This work has revealed that the hillslope- and catchment water balances are highly compartmentalized. Over the coming decade, Jeff's main goals are to transition to synthesizing what the group has learned, applying this knowledge to engineered hillslopes and at the MOST Facility and continuing to expand his early career mentoring efforts.