No. From recreaction.gov:
The Salmon River originates in the Sawtooth and Lemhi valleys of central and eastern Idaho. Springs and snowmelt from the Sawtooth and Salmon River mountains feed this wild river. The Salmon River flows undammed for its 425-mile length and drains about 14,000 square miles all within the borders of Idaho. It is the longest free-flowing river in the lower 48 states. From elevations above 8,000 feet, the Salmon cascades to an elevation of 905 feet before it joins the Snake River in Hells Canyon, near the Idaho/Oregon border.
The Salmon River is historically known as The River of No Return. For more than 105 years after the first Euro Americans came to the area, only one-way trips down the river were possible. Initially, the most commonly used boats were wooden scows, designed to carry heavy loads and withstand whitewater. They were then dismantled and used for lumber at the trips conclusion. It was from these trips that the nickname, River of No Return originated.
The Salmon flows through a vast wilderness and the second deepest gorge on the continent. Only Hells Canyon in the Snake River is deeper. The Salmons granite-walled canyon is one-fifth of a mile deeper than the Grand Canyon. For approximately 180 miles, the Salmon River canyon is more than one mile deep.
In the 151 miles from North Fork to Riggins, the Salmon River drops a total of 1,910 feet over 12 feet per mile. Peak flows occur from the middle of May to early July. The River is at its lowest in January and February, but highs and lows are subject to seasonal changes. Historically, wooden rafts, swimming, cable crossings, bridges or ferries were the only ways to cross the River of No Return. Today, there are pack bridges at Stoddard trailhead, Campbells Ferry, Mackay Bar and Wind River.
All boaters floating the Wild section of the Wild and Scenic Salmon River are required to obtain a trip permit before launching at any time of the year. The section of river covered by this system extends from Corn Creek to Long Tom Bar. Boaters floating the South Fork Salmon River and exiting onto the Wild Section of the Main Salmon must obtain a tributary permit before floating. South Fork floaters will need to contact the Krassel Ranger District for permit information at 208-634-0616.
Boating permits are required year round. Outside the lottery season, the number of launches is unlimited, but a boating trip permit is required before launching. During the lottery season, a 21-day cancellation is required. During the lottery season, the size of the group determines the maximum length of stay, and tributary permits are required for South Fork floaters.
The lottery period for the Wild Section of the Main Salmon extends from June 20 through September 7. During the lottery season, no more than eight (
float boat parties (commercial plus non-commercial) are allowed to launch each day. Of the total eight (
launches per day, the actual number of non-commercial and commercial launches will vary, but is approximately four (4) private (non-commercial) and four (4) commercial launches each day.
Permit Area Facility Details - Recreation.gov - Recreation.gov