Updated for 2018. The fishing season begins the Saturday of Memorial Day weekend (usually the last weekend in May) and extends through and includes the first Sunday in November. Exceptions are noted within the Exceptions to General Regulations table within the Fishing Regulations handbook. Also note that there are areas within the park that are permanently closed to human entry and disturbance, have seasonal area and trail closures, off-trail travel and daylight hour limitations, and party size recommendations.
Permits and Fees
A permit is required to fish in Yellowstone. Anglers 16 years of age and older are required to purchase either a $10 ten-day or $20 season permit. Anglers 12 to 15 years of age are required to obtain a non-fee permit. Children 11 years of age or younger may fish without a permit when supervised by an adult. The adult is responsible for the child's actions. Fishing permits are available at all ranger stations, visitor centers, and Hamilton General Stores. No state fishing license is required in Yellowstone National Park.
Yellowstone National Park has implemented a non-toxic fishing program. Nationwide, over three million waterfowl die from lead poisoning through ingestion. Because lead from fishing tackle concentrates in aquatic environments, tackle such as leaded split shot sinkers, weighted jigs, and soft weighted ribbon for fly fishing are prohibited. Only non-toxic alternatives to lead are allowed.