yards upstream of the Heaton Flats trailhead and day use area to 100 yards upstream of the confluence with Williams Canyon, as a recreational river. (273) North Fork San Gabriel River, California The 4.3-mile segment of the North Fork San Gabriel River from the confluence with Cloudburst Canyon to 0.25 miles upstream of the confluence with the West Fork San Gabriel River, to be administered by the Secretary of Agriculture as a recreational river. (274) West Fork San Gabriel River, California The following segments of the West Fork San Gabriel River, to be administered by the Secretary of Agriculture in the following classes: (A) The 6.7-mile segment from 0.25 miles downstream of its source near Red Box Gap in sec. 14, T. 2 N., R. 12 W., to the confluence with the unnamed tributary 0.25 miles downstream of the power lines in sec. 22, T. 2 N., R. 11 W., as a recreational river. (B) The 1.6-mile segment of the West Fork from 0.25 miles downstream of the powerlines in sec. 22, T. 2 N., R. 11 W., to the confluence with Bobcat Canyon, as a wild river. (275) Little Rock Creek, California The following segments of Little Rock Creek and tributaries, to be administered by the Secretary of Agriculture in the following classes: (A) The 10.3-mile segment from its source on Mt. Williamson in sec. 6, T. 3 N., R. 9 W., to 100 yards upstream of the confluence with the South Fork Little Rock Creek, as a wild river. (B) The 6.6-mile segment from 100 yards upstream of the confluence with the South Fork Little Rock Creek to the confluence with Santiago Canyon, as a recreational river. (C) The 1-mile segment of Cooper Canyon Creek from 0.25 miles downstream of Highway 2 to 100 yards downstream of Cooper Canyon Campground, as a scenic river. (D) The 1.3-mile segment of Cooper Canyon Creek from 100 yards downstream of Cooper Canyon Campground to the confluence with Little Rock Creek, as a wild river. (E) The 1-mile segment of Buckhorn Creek from 100 yards downstream of the Buckhorn Campground to its confluence with Cooper Canyon Creek,