Green Hollow Reservoir Fish Stocking
Montana · 1990–2020 on record
According to Montana fish & wildlife agency, Green Hollow Reservoir was last stocked July 13, 2020 with Arctic Grayling. Green Hollow Reservoir has 4 stocking records on file, spanning 1990–2020, with about 21,809 fish stocked over that period.
Angler's Field Guide
Fishing Tips & Stocking Guide for Green Hollow Reservoir
Practical advice on fish behavior, recommended tackle, and state regulations for anglers fishing in Montana.
Post-Plant Behavior & Timing
Hatchery-raised fish are conditioned to pelleted feed and open raceways. Following a release into Green Hollow Reservoir, they typically congregate in schools near public access points, boat ramps, or inlets for the first 24 to 48 hours while adjusting to natural water conditions.
Since Green Hollow Reservoir was last stocked July 13, 2020, anglers visiting within 1 to 2 weeks of a reported event generally experience the highest activity before fish disperse into deeper cover.
State Regulations & Licensing
- •Fishing License: A valid Montana freshwater fishing license is required for anglers age 16 and older.Purchase Montana license online →
- •Official Rules & Limits: Bag limits, bait restrictions, and seasonal boundaries are set by Montana fish & wildlife agency.Official Montana regulations guidebook →
- •Ethical Conservation: Use barbless hooks and keep fish submerged in water during unhooking.Trout Thermal Advisory: When water temperatures rise above 68°F (20°C), released trout face severe mortality from thermal exhaustion. Target warmwater species or fish early in the morning when lakes and streams warm up.
Recommended Tackle & Presentations
Techniques tailored to the species stocked in Green Hollow Reservoir:
Stocked Trout Tactics
Use light 4–6 lb monofilament or fluorocarbon line. Float scented dough bait (PowerBait) 12–18" off bottom using a sliding slip-sinker rig with a size 14–16 treble hook. For active casting, throw 1/16 to 1/8 oz inline spinners (Panther Martin, Rooster Tail) or small spoons (Kastmaster) along drop-offs.
Arctic Grayling Profile Tips
A popular dry-fly target in Montana and Utah's high-country waters, prized for its willingness to rise.
Rainbow Trout Profile Tips
The most commonly targeted stocked trout in the country, taken on bait, spinners, and flies alike; a common first fish for new anglers.
Recommended Tackle for Green Hollow Reservoir
Field-tested tackle and presentations matched to the species stocked here.
Berkley PowerBait Floating Trout Dough
Hatchery-raised trout are conditioned to pelleted scents; scented dough floated 12–18 inches off bottom consistently triggers strikes.
Panther Martin Classic Teardrop Inline Spinner
The heavy convex blade spins instantly upon retrieval, sending vibration through the water that triggers aggressive reaction bites along drop-offs.
Sliding Sinker & Treble Hook Rigging Kit
Sliding egg sinkers allow cautious trout to run with bait without feeling line drag, while size 14–16 treble hooks keep dough bait securely pinned.
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Nearby stocked waters
Other stocked waters near Green Hollow Reservoir, freshest activity first.
Chiquita Lake
10 mi1 species · 2 records
Last stocked July 2023
Margo Lake
9 mi1 species · 15 records
Last stocked July 2022
Chilled Lakes
9 mi1 species · 16 records
Last stocked July 2022
Green Hollow Reservoir #2
1 mi1 species · 15 records
Last stocked June 2021
Squaw Creek
8 mi3 species · 109 records
Last stocked June 1977
South Cottonwood Creek
10 mi3 species · 14 records
Last stocked September 1950
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| July 13, 2020 | Arctic Grayling | 0 | 0 | Montana fish & wildlife agency |
| May 18, 1992 | Rainbow Trout | 7,420 | 4.4" | Montana fish & wildlife agency |
| May 28, 1991 | Rainbow Trout | 6,885 | 4.5" | Montana fish & wildlife agency |
| October 29, 1990 | Rainbow Trout | 7,504 | 5.6" | Montana fish & wildlife agency |
Frequently asked
When was Green Hollow Reservoir last stocked?
According to Montana fish & wildlife agency, Green Hollow Reservoir was last stocked July 13, 2020 with Arctic Grayling.
What fish species are stocked in Green Hollow Reservoir?
Green Hollow Reservoir is stocked with Arctic Grayling and Rainbow Trout.
How often is Green Hollow Reservoir stocked?
Green Hollow Reservoir is stocked intermittently — 4 recorded stockings between 1990 and 2020.
How many fish have been stocked in Green Hollow Reservoir?
About 21,809 fish have been stocked in Green Hollow Reservoir across 4 recorded events since 1990, per Montana fish & wildlife agency.
What size are the fish stocked in Green Hollow Reservoir?
Fish stocked in Green Hollow Reservoir average about 4.8 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Green Hollow Reservoir?
Yes, all anglers age 16 and older generally need a valid Montana freshwater fishing license. Always review current regulations from Montana fish & wildlife agency for site-specific rules, bag limits, or stamps.
How do you catch stocked trout in Green Hollow Reservoir?
Freshly stocked trout in Green Hollow Reservoir typically respond well to floating dough bait (such as PowerBait) floated 12–18 inches off bottom on light 4–6 lb leader, live nightcrawlers under a bobber, and small inline spinners or spoons retrieved along shorelines and drop-offs.