The MP 515 to Chalk Creek Bridge river run on the Jarbidge River in Nevada is a challenging Class III to IV rapids run with steep drops, tight turns, and challenging boulder gardens. This river run is best suited for experienced kayakers and rafters who are comfortable with technical whitewater maneuvers. The best time to float this section of water is during the late spring and early summer months when water levels are high, with recommended CFS (cubic feet per second) ranges of 800-1,300. Obstacles to watch out for include tight chutes, large boulders, and turbulent eddies.