Holter Dam is a hydroelectric straight gravity dam on the Missouri River about 45 miles (72 km) northeast of Helena, Montana, in the United States.[3] The dam, which was built between 1908 and 1918, is 1,364 feet (416 m) long and 124 feet (38 m) high.[1][3] The reservoir formed by the dam, Holter Lake (also known as Holter Reservoir) is 25 miles (40 km) long and has a storage capacity of 243,000 acre feet (300,000,000 m3) of water when full.[4] The dam is a "run-of-the-river" dam because it can generate electricity without needing to store additional water supplies behind the dam
Holter Reservoir
Special Notices & Closures
Fishing Report for the week of 07/22/2024
Walleye and perch fishing has been great in the coves and bays above the Dam, along the Clay Banks, out from Cottonwood Creek, and near Mann Gulch while using purple jigs tipped with worms or leeches in 15 to 30 feet of water. A few kokanee are being caught between Split Rock and the Dam while using down riggers with dodgers or cowbells with pink or purple kokanee spinners tipped with corn 50-70 feet deep. Rainbow fishing has been good during the early morning hours on the upper end of the reservoir while fly fishing with Prince Nymphs and while tolling Ford Fenders or cowbells with lead core line and wedding rings on the lower end of the reservoir.
| Size: | 3666.94 acres |
| Elevation: | 3598.16 ft |
| Status of the Fishery: | Holter Reservoir is a popular year-round fishery for rainbow trout, walleye and yellow perch. In addition, kokanee salmon can be targeted primarily in deeper water near the dam. |
| Township/Range/Section: | 14N 3W 27 |
| Latitude/Longitude: | 46.93494 -111.96336 |
| FWP Region: | Region 4 |
| County: | Lewis & Clark |
| Fishing District: | Central |
Click on rows to select them for use in other tabs.
| Waterbody | Section | Field Form Type | Date | Purpose | Species |
|---|
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams
| Species | Count | Avg | StdDev | Min | Max | AvgWgt | StdDevWgt | MinWeight | S/L | Sects | Surveys | Waterbody |
|---|
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams
| Waterbody | Section | Species | Count | AveLength | StdDevLength | MinLength | MaxLength | AveWeight | StdDevWeight | MinWeight | MaxWeight |
|---|
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams
| Waterbody | Year | Section | Species | Count | AveLength | StdDevLength | MinLength | MaxLength | AveWeight | StdDevWeight | MinWeight | MaxWeight |
|---|
To see this data, first select one or more rows from the Collection Info tab.
This is a preview, all fields will be visible by selecting a download option. For Comparative analysis all Length Units are millimeters : all Weights are grams.
| Year | Species Abbrv | Length | Weight | M/C | Count | Sex | Mort | Hook Scar | Disease | Scales | Otolith | Fin Clip | Tag | Comment | Genetics | Age | Stomach | Intercept | Slope | Gear | Equipment | Trip | Date | Pass/Run | Water | Section | Lat/Down | Lon/Down | Lat/Up | Lon/Up | Agency | Start Depth | End Depth |
|---|
| Year | Angler Days | Std. Error |
|---|---|---|
| 2021 | 53427 | 6160 |
| 2020 | 50672 | 5016 |
| 2019 | 52786 | 5233 |
| 2017 | 96091 | 9779 |
| 2015 | 90470 | 6409 |
View the latest Montana Fishing Regulations.
No Gauging Stations found.
This waterbody has a fish consumption advisory. Please see the link for guidelines.
Fish Consumption Guidelines (PDF)
