The river flows by Sun Valley and Ketchum, where it receives the tributary streams of Warm Springs Creek and Trail Creek. Below Ketchum, it is joined by the East Fork Wood River at Gimlet before passing by the small cities of Hailey and Bellevue. Continuing south, the river enters the Wood River Valley, the northern part of Magic Valley, after which it flows into Magic Reservoir. A tributary stream, Camas Creek,[Note 1] joins the river in Magic Reservoir.
Big Wood River's water flow is affected by numerous irrigation reservoirs and canals on the river itself and its tributaries.
Variant names of the Big Wood River, according to the USGS, include Malad River, Malade River, Wood River, Poisonous Beaver River, and Sickley River.[1]
^One of the tributaries of the Big Wood River is the Camas Creek (not to be confused with at least four other Camas Creeks in Idaho). One of the tributaries of that Camas Creek is called the Malad River. What makes that interesting is that the Big Wood River empties into the Malad River, thus making the Malad River and tributary of the Malad River.
^ abU.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. "The National Map". Archived from the original on 2012-03-29., accessed May 4, 2011
^Yellowstone Business Partnership (2010). "BLACK MAGIC CANYON - IDAHO BLM AREA OF INTEREST". Archived from the original on 2013-06-13. Retrieved 31 March 2015. Over the last 10,000 years, the Big Wood River - along the Salmon River-Sawtooth Scenic Byways - has carved a narrow canyon of exquisite, swirling rock sculptures into surrounding black basalt.{{cite news}}: |author= has generic name (help)