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Lakes / Montana / Hyalite Reservoir

Hyalite Reservoir, Montana

158 acres
Surface Area
6,704.32 ft
Surface Elevation

Where It Sits, and How Deep It Goes

Locator - Montana

BillingsMissoulaHyalite ReservoirGallatin Co.

45.48 degrees N, 110.97 degrees W - Gallatin County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Montana Fish, Wildlife & Parks coordinates, not by eye. Schematic - not a survey map.

How Hyalite Reservoir Stacks Up

Fish Species

Arctic GraylingBrook TroutYellowstone Cutthroat Trout

Species recorded for this lake. Presence only - no abundance ratings.

Facts and Figures

Waterbody ID{381913C0-4E1F-4674-96A2-7F1A8EE85945}
CountyGallatin
Coordinates45.4806, -110.9675

Largest Lakes in Montana

#LakeCountySurface AreaMax Depth
1Fort Peck LakeValley233,053 acres-
2Flathead LakeLake122,132 acresAbout 380 ft
3Canyon Ferry LakeBroadwater32,773 acresAbout 170 ft
4Lake KoocanusaLincoln28,723 acres-
5Hungry Horse ReservoirFlathead23,577 acres-
Sources: Montana Fish, Wildlife & Parks lake data (ID {381913C0-4E1F-4674-96A2-7F1A8EE85945}). Verified October 30, 2026.