The John Day River, a tributary of the Columbia River, is approximately 281 miles. The un-dammed river is the longest free flowing river in Oregon. The two main attractions are steelhead and smallmouth bass. No hatchery fish are planted in the John Day, but the native return in fall is strong with the run peaking in November and December. The smallmouth bass compete for popularity with the steelhead and anglers are drawn to the river with the chance of catching trophy smallies (20+") during the summer months.