Unit 124 is the far northeast corner—Sedgwick and northern Phillips County country wedged against the Nebraska line near Julesburg, with the South Platte River bottom forming a major axis across the north end. Elevations 3,800 to 4,400 feet. The South Platte itself is a green ribbon of cottonwood, willow, and Russian olive that holds a quietly excellent whitetail population—the genetics, the irrigated corn and alfalfa, and the river-bottom cover all stack up. Off the river, the country is rolling shortgrass and sandsage with heavy ag (corn, wheat, sugar beets), aged CRP, and the deeper sandhill country pushing into the unit from Nebraska. Mule deer hold the sand draws and shelterbelts; pronghorn cover the open uplands; the whitetail rut on the Platte in mid-November is the marquee hunt of the unit. Public ground is more meaningful here than in some other plains units: Tamarack Ranch SWA on the west end of the unit (a multi-thousand-acre piece on the river—lottery walk-in for some seasons), Jumbo Reservoir SWA, Julesburg SWA, and a Walk-In Access roster that stays useful most years. US-385 runs north-south through Julesburg; I-76 cuts east-west; US-138 follows the river. Julesburg has gas, food, motels, and is right at the I-76 / Nebraska junction; Holyoke south is the other supply town. Cell service holds on I-76 and US-385, fair on the county grid. Tamarack and the South Platte bottom can produce 160- to 170-class whitetail with regularity if you can get in—lottery walk-in odds are part of the strategy and worth playing every year.