Big Sulphur Rapids is a stretch of rapids in Wallowa County, Oregon, in the Blue Mountains region. It lies about 26.8 miles west of Grangeville and roughly 122.3 miles east of Pasco as the crow flies.
The Blue Mountains of northeastern Oregon and adjacent states are a group of dissected uplands and volcanic plateaus with ponderosa pine, Douglas fir and grand fir forest and dry grassland on lower slopes. Deep canyons and steep tributaries carry snowmelt streams with waterfalls.
There are 26 recorded rapids in Wallowa County. Boulder Rapids, is under a mile away across the state line in Idaho. Dry Creek Rapids, is under a mile away. Deep Creek Rapids, is under a mile away across the state line in Idaho.
Big Sulphur Rapids is located at 45.7814° N, 116.6394° W. The listing is based on the USGS Geographic Names Information System, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The exact position has not yet been verified on aerial imagery, so treat the map pin as approximate. Details on trails, parking and access have not been documented for this rapid yet.