Not very well known. Has great problems. One hour from Boise. Granite and volcanic rock.
See Swan falls bouldering by Sandi Epeldi for more info
Take I-84 West out of Boise Take the Nampa/Marsing exit Left at bottom of exit Go through Nampa city center You will soon find that you are on Hwy 45 Drive on Hwy 45 for about 15-16 miles Cross the Snake River Go 200 yards and stay RIGHT atfork in the road Go 100 yards and take right at STOP sign Go about a mile and take next LEFT RIGHT on Upper Reynolds Creek Road past the dairy farm. Drive about 7.5 miles past cattle grate Look for large amounts of taller boulders on the LEFT AND RIGHT side hilltops
Mountain Project's determination of some of the classic, most popular, highest rated routes for Reynolds Creek: