Lahontan National Fish Hatchery Complex

04/10/2026

The numbers below reflect the weekly totals of fish passed upstream from Pyramid Lake to the Truckee River above Marble Bluff Dam to spawn. All Lahontan cutthroat trout (LCT) encountered at the facility are being passed upstream of the dam.

2026 Weekly Total @ MBFF (3/29-4/4)
Cui-ui - 3,710
Tahoe Sucker - 1
LCT - 157

Photo 1: Biologist holding a Lahontan cutthroat trout at Marble Bluff Fish Passage Facility.

04/02/2026

The numbers below reflect the weekly totals of fish passed upstream from Pyramid Lake to the Truckee River above Marble Bluff Dam to spawn. All Lahontan cutthroat trout (LCT) encountered at the facility are being passed upstream of the dam.

2026 Weekly Total @ MBFF (3/22-3/28)
Cui-ui - 113,358
Tahoe Sucker - 7
Lahontan cutthroat trout - 175

Photo 1: Biologist holding a Cui ui at Marble Bluff Fish Passage Facility. (Credit USFWS)

03/27/2026

The numbers below reflect the weekly totals of fish passed upstream from Pyramid Lake to the Truckee River above Marble Bluff Dam to spawn.

2026 Weekly Total @ MBFF (3/15-3/21)
Cui-ui - 11,066
Tahoe Sucker - 20
LCT - 755

Photo 1: Biologist holding a Cui-ui at Marble Bluff Fish Passage Facility. (Credit USFWS)

03/20/2026

2026 Weekly Total @ MBFF (3/8-3/14)
Cui-ui - 50
Tahoe Sucker - 12
LCT - 471

Photo 1: Biologist holding a large Lahontan cutthroat trout at Marble Bluff Fish Passage Facility. (Credit USFWS)

03/12/2026

2026 Weekly Total @ MBFF (3/1-3/7)
Cui-ui -3
Tahoe Sucker -9
LCT -63

This is earlier than we normally see Cui-ui at the facility.

Photo 1: Biologist holding a large Lahontan cutthroat trout at Marble Bluff Fish Passage Facility. (Credit USFWS)

Photo 2: Biologist holding a Cui-ui sucker at Marble Bluff Fish Passage Facility. (Credit USFWS)

03/04/2026

2026 Weekly Total @ MBFF (2/22-2/28)
Cui-ui -0
Tahoe Sucker -2
LCT -192

Photo 1. Large Lahontan cutthroat trout being held by a biologist. (Credit USFWS)

02/23/2026

2026 Weekly Total @ MBFF (2/8-2/21)
Cui-ui-0
Tahoe Sucker-0
LCT-15

Photo 1: Truckee River downstream of Marble Bluff Dam. (Credit USFWS)

02/10/2026

The Lahontan National Fish Hatchery Complex (Lahontan NFHC) began operations at the Marble Bluff Fish Passage and Research Station (MBFF) on January 16th, 2026. We thank the Bureau of Reclamation for completing the necessary maintenance for this spawning season. Starting next week, we will share weekly updates every Monday on the number of fish we assist upstream during the previous week.

Photo 1: Truckee River downstream of Marble Bluff Dam.

10/01/2025

Due to the federal government shutdown, this account is not being actively updated.
For more information, please visit:

Operations in the Absence of Appropriations

12/13/2024

The 2025 Marble Bluff spawning season will kickoff in January and we have an important update. The Marble Bluff office now has a new phone number! If you are looking to schedule a tour or contact the facility with a question please call 775-861-6367. Hope to see you out there!

Photo 1: Fish lock at Marble Bluff Fish Passage Facility. (Credit USFWS)
Photo 2: Biologist holding a large Lahontan cutthroat trout at Marble Bluff. (Credit USFWS)
Photo 3: Roy H. holding a Cui ui at Marble Bluff. (Credit USFWS)

07/29/2024

Over the last 2 weeks the Lahontan National Fish Hatchery Complex has stocked 15,069 catchable Pilot Peak strain Lahontan cutthroat trout into Lake Tahoe at Meeks Bay, Lake Forest Boat Ramp, and Sand Harbor State Park. Stocking and updates will continue bi weekly throughout the summer at various publicly accessible locations in both California and Nevada. Approximately 25% of the trout stocked will be tagged with a T-bar anchor tag that has a unique ID and phone number on it. Anglers are encouraged to report their catch and help our biologists evaluate the success of the stocking along with the growth, survival and distribution of the fish. Thank you to the Washoe Environmental Protection Dept., California Department of Fish and Wildlife, Nevada Department of Wildlife, Tahoe Regional Planning Agency, U.S. Forest Service - Lake Tahoe Basin Management Unit, California State Parks, and Nevada State Parks for the ongoing collaboration in this effort.

Fun Facts:
-Lahontan cutthroat trout are the only trout native to Lake Tahoe.
-Lahontan cutthroat trout are the state fish of Nevada.
-Lahontan cutthroat trout are the largest inland cutthroat trout in the world.

Photo: Staff netting Lahontan cutthroat trout during Washoe Tribe stocking event at Meeks Bay. (Credit USFWS)

07/12/2024

Over the last 2 weeks the Lahontan National Fish Hatchery Complex has stocked 19,238 catchable Pilot Peak strain Lahontan cutthroat trout into Lake Tahoe at El Dorado Beach, Zephyr Cove Marina, Kings Beach State Park, and Sand Harbor State Park. Stocking and updates will continue bi weekly throughout the summer at various publicly accessible locations in both California and Nevada. Approximately 25% of the trout stocked will be tagged with a T-bar anchor tag that has a unique ID and phone number on it. Anglers are encouraged to report their catch and help our biologists evaluate the success of the stocking along with the growth, survival and distribution of the fish. Thank you to the Washoe Environmental Protection Dept., California Department of Fish and Wildlife, Nevada Department of Wildlife, Tahoe Regional Planning Agency, U.S. Forest Service - Lake Tahoe Basin Management Unit, California State Parks, and Nevada State Parks for the ongoing collaboration in this effort.

​Fun Facts:
-Lahontan cutthroat trout are the only trout native to Lake Tahoe.
-Lahontan cutthroat trout are the state fish of Nevada.
-Lahontan cutthroat trout are the largest inland cutthroat trout in the world.

Photo: Lahontan National Fish Hatchery Complex stocking truck delivering fish to Lake Tahoe. (Credit USFWS)