Bonanza Reservoir trout stocking

Montana · lake

Bonanza Reservoir was last stocked 4 months ago (May 27, 2026). We have 2 stockings on record since Jun 4, 2025, 1 in the last 12 months (507 fish). Species stocked: rainbow trout.

Weather at Bonanza Reservoir

• Tonight
  48°F
  Mostly Clear
  wind 3 to 7 mph
• Friday
  76°F
  Sunny
  wind 6 to 16 mph
• Friday Night
  41°F
  Partly Cloudy
  2% rain · wind 14 to 18 mph
• Saturday
  61°F
  Sunny
  wind 9 to 17 mph
• Saturday Night
  40°F
  Mostly Cloudy
  4% rain · wind 5 to 12 mph
• Sunday
  62°F
  Mostly Cloudy
  4% rain · wind 7 mph

Forecast from the National Weather Service for this location, refreshed hourly.

What is stocked

Stocking history

From Montana fish and wildlife agency reports, collected nightly and kept after the agency takes them down. Agencies revise reports; check the agency's report before you go.

Where is Bonanza Reservoir?

Montana. The marker is the agency's location for this water; streams are often stocked at several access points.

DirectionsLarger map

Stocked waters near Bonanza Reservoir

• Castle Lakelake · 7 mistocked Sep 17, 2025
• Bair Reservoirlake · 9 mistocked Jun 3, 2026
• Hundred Dollar Bill Pond (; Mud Creek Reservoir)lake · 13 mistocked Jun 9, 2026
• Lake Sutherlinlake · 14 mistocked Jun 30, 2026
• Martinsdale Reservoirlake · 14 mistocked May 28, 2026
• Newlan Reservoirlake · 21 mistocked Jul 2, 2026
• Cook Reservoir 2lake · 22 mistocked May 27, 2026

Stocked this week in Montana

Questions about Bonanza Reservoir

When was Bonanza Reservoir last stocked?

The latest reported stocking was May 27, 2026 (rainbow trout, 507 fish), according to Montana agency reports.

How often is Bonanza Reservoir stocked?

It was stocked 1 times in the last 12 months.

What kind of trout are stocked in Bonanza Reservoir?

Rainbow trout (2 stockings, 1,006 fish).