How many miles of river have been protected under the National Wild & Scenic Rivers System?

As of June 2022, some 226 river segments comprising 13,417 miles have been afforded protection in the National System.  These nationally recognized rivers comprise some of the nation’s greatest diversity of recreational, natural, and cultural resources, offering great scientific value and scenic beauty.  By comparison, more than 75,000 large dams across the country have modified at least 600,000 miles, or about 17% of America’s rivers (possibly more than 20% – figures are best estimates).