John Reservoir near Glasgow: Fishing Spots, Seasons and Access

• Overview

  Within Valley County, Montana, you have John Reservoir. The land about it is sage and rock. It covers about 4 acres, so this is small water you can walk round in under an hour. By elevation it sits in the lower part of our Montana listings. Glasgow sits 16 miles from here and is the nearest stop. Wolf Point lies 54 miles off, Malta another 56 miles. One jurisdiction covers this water end to end.

• Where to Fish on John Reservoir

  No published figure covers depth, so learn it as you fish. Draw-down through summer strips the margins, so follow the water out. Held water runs deepest at the wall and shallows back to the inflow. Records held for Valley County cover Chinook salmon, northern pike and cisco. Some of the species recorded here are protected or tightly regulated, so check what may be targeted before you fish. Treat John Reservoir as a water to read rather than to cover.

• Seasonal Patterns

  In an average year July sits at 72°F and January at 14°F. Seasons are distinct, and each one fishes differently. Winter fishing happens on the ice here, with open water back around early April. The water is typically free of ice between early April and late November. Right after break-up, and again as the nights sharpen, is when to go. Anyone fishing John Reservoir regularly works to that calendar.

• Tackle & Baits

  Ownership and access are not documented in what we hold. No slipway, car park or made path shows up nearby in mapping, so treat access as rough. Largemouth respond to soft plastics tight to cover; go weedless where the growth is heavy. Look for a notice board at the entrance. Some stretches are reserved and marked as such on the ground. Olson Reservoir sits 1.4 miles off and takes the overflow. Confirm before you fish John Reservoir.