An adjustable gutter guard system includes a first water management component, a second water management component, and a screen. The first water management component includes a first main body section and a front receiver section. The second water management component is slideably arranged relative to the first water management component to adjust the width of the adjustable gutter guard system. The second water management component includes a second main body section and a rear receiver section. The screen is positioned in contact with the first main body section and the second main body section. Both the first main body section and the second main body section include a longitudinal body, a plurality of passageways through the longitudinal body, and at least one wall extending from a top surface of the longitudinal body.