Tiber Reservoir fishing

Fishing at Tiber Reservoir is on a reservoir, stocked with Walleye and Rainbow Trout. It is stocked about 0.9 times a year since 2011, most often in July and September. Species guides list dawn, dusk, and night for Walleye and dawn and dusk for Rainbow Trout.

Last stocked

May 19, 2025

Plants on record

14

Since 2011

Species recorded

2

Average size

3.4 in

Elevation

2,989.2 ft

Access and facts

Water type
reservoir
Nearest town
Chester
Boat ramp
Yes
Facilities
camping, dock

Also known as Lake Elwell, this Bureau of Reclamation reservoir on the Marias River holds about 21,300 surface acres and 181 miles of shoreline. Concrete boat ramps, a marina, campgrounds, and picnic shelters ring the water, about 18 miles southwest of Chester.

Sources: water_type , access , shore_notes , nearest_town

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How Tiber Reservoir is stocked

The first plant of the year usually falls in the last week of August. In 2025 it was May 19, 2025, earlier than usual.

No plants recorded in 2012, 2013, 2014, 2018, 2023, and 2024.

Henry Reservoir (32 mi), Leningtons Reservoir (34.4 mi), Cameron Lake (34.6 mi), and Parsell Pond (38.6 mi) were stocked more recently. Henry Reservoir is also stocked with Rainbow Trout, Leningtons Reservoir is also stocked with Rainbow Trout, Cameron Lake is also stocked with Rainbow Trout, and Parsell Pond is also stocked with Rainbow Trout.

Fish at Tiber Reservoir

Fishing Tiber Reservoir is most likely to be for Rainbow Trout. Rainbow Trout accounts for 12 of 14 plants on record, ahead of Walleye.

Around the dates Tiber Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 60.2°F in September, 72.9°F in July, 44.6°F in October, 55.1°F in May. That is air temperature at these coordinates, not water temperature. Open-Meteo

Rainbow Trout 12 plants
Plants
12 of 14
Last stocked
May 19, 2025
Average length
3.7 in

Seasons and rigs are on the Rainbow Trout guide.

Walleye 2 plants
Plants
2 of 14
Last stocked
July 2, 2019
Average length
1.7 in

Seasons and rigs are on the Walleye guide.

Fish stocked per year

  • 24,5782011
  • 153,8212015
  • 50,0002016
  • 48,2772017
  • 93,9782019
  • 44,3172020
  • 35,1452021
  • 89,5712022
  • 67,2152025

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
May 19, 2025 Rainbow Trout 67,215 1.8 in report
September 14, 2022 Rainbow Trout 49,910 3.86 in report
September 14, 2022 Rainbow Trout 39,661 3.77 in report
August 19, 2021 Rainbow Trout 35,145 3.29 in report
October 1, 2020 Rainbow Trout 23,240 4.56 in report
October 1, 2020 Rainbow Trout 21,077 4.36 in report
September 25, 2019 Rainbow Trout 43,703 4.39 in report
July 2, 2019 Walleye 50,275 1.69 in report
September 12, 2017 Rainbow Trout 48,277 4.29 in report
September 20, 2016 Rainbow Trout 50,000 4.1 in report
November 5, 2015 Rainbow Trout 49,800 4.49 in report
July 28, 2015 Rainbow Trout 33,478 2.67 in report
July 28, 2015 Rainbow Trout 70,543 2.69 in report
July 12, 2011 Walleye 24,578 1.8 in report

Species stocked here

Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.

Nearest lakes