The Murtaugh Canyon river run on the Snake River in Idaho is an exhilarating adventure for experienced paddlers. The Class III-IV rapids offer a thrilling challenge, with obstacles like boulder gardens, wave trains, and drops. The best time to float this section of water is in the late spring and early summer, when the water levels are high enough to provide optimal flow. The recommended flow rate is between 4,000-10,000 cfs, and paddlers should be prepared for cold water and strong currents. Overall, the Murtaugh Canyon river run is a must-do for adrenaline junkies looking for a challenging and exciting whitewater experience.