Sylvia Lake Fish Stocking
Montana · 1929–2025 on record
According to Montana fish & wildlife agency, Sylvia Lake was last stocked August 8, 2025 with Cutthroat Trout. Sylvia Lake has 66 stocking records on file, spanning 1929–2025, with about 758,825 fish stocked over that period.
When Sylvia Lake is stocked
Sylvia Lake is typically stocked in summer, most often in June — 28 stocking events in that peak month.
Angler's Field Guide
Fishing Tips & Stocking Guide for Sylvia Lake
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 Sylvia Lake, 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 Sylvia Lake was last stocked August 8, 2025, 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 Sylvia Lake:
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.
Cutthroat Trout Profile Tips
Known for being relatively easy to catch on dry flies, making it a favorite of western fly anglers; many subspecies are managed under catch-and-release rules to protect native populations.
Arctic Grayling Profile Tips
A popular dry-fly target in Montana and Utah's high-country waters, prized for its willingness to rise.
Recommended Tackle for Sylvia Lake
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.
As an Amazon Associate, StockedWaters earns from qualifying purchases at no additional cost to you. Recommendations are chosen for hatchery-conditioned fish behavior and ethical rigging. We may receive a referral commission if you buy through these links. Read our editorial policy & standards.
Nearby stocked waters
Other stocked waters near Sylvia Lake, freshest activity first.
Bootjack Lake
6 mi4 species · 145 records
Last stocked June 2026
Loon Lake
5 mi7 species · 182 records
Last stocked May 2026
Smith Lake
6 mi6 species · 68 records
Last stocked May 2026
Davis Lake
6 mi1 species · 16 records
Last stocked July 2022
Sheldon's Pond
5 mi1 species · 1 records
Last stocked August 2002
Robertson Creek
8 mi1 species · 2 records
Last stocked August 2000
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| August 8, 2025 | Cutthroat Trout | 2,000 | 1.5" | Montana fish & wildlife agency |
| September 4, 2024 | Cutthroat Trout | 2,000 | 1.48" | Montana fish & wildlife agency |
| June 22, 2023 | Arctic Grayling | 11,400 | 1" | Montana fish & wildlife agency |
| July 13, 2022 | Arctic Grayling | 10,010 | 1.54" | Montana fish & wildlife agency |
| July 13, 2022 | Cutthroat Trout | 1,998 | 1.23" | Montana fish & wildlife agency |
| September 1, 2021 | Cutthroat Trout | 2,000 | 2" | Montana fish & wildlife agency |
| June 3, 2021 | Arctic Grayling | 10,000 | 0.95" | Montana fish & wildlife agency |
| August 5, 2019 | Cutthroat Trout | 1,500 | 1.21" | Montana fish & wildlife agency |
Show 42 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 3, 2019 | Arctic Grayling | 10,000 | 0.25" | Montana fish & wildlife agency |
| August 2, 2018 | Cutthroat Trout | 2,000 | 1.5" | Montana fish & wildlife agency |
| August 30, 2017 | Cutthroat Trout | 2,100 | 2" | Montana fish & wildlife agency |
| August 30, 2017 | Cutthroat Trout | 1,998 | 1.62" | Montana fish & wildlife agency |
| June 30, 2016 | Arctic Grayling | 10,000 | 1.12" | Montana fish & wildlife agency |
| August 27, 2015 | Cutthroat Trout | 1,829 | 1.65" | Montana fish & wildlife agency |
| June 22, 2015 | Arctic Grayling | 10,150 | 1.1" | Montana fish & wildlife agency |
| September 5, 2014 | Cutthroat Trout | 2,100 | 1.52" | Montana fish & wildlife agency |
| August 5, 2013 | Cutthroat Trout | 1,319 | 1.1" | Montana fish & wildlife agency |
| June 19, 2013 | Arctic Grayling | 10,000 | 1" | Montana fish & wildlife agency |
| August 30, 2012 | Cutthroat Trout | 2,003 | 1.48" | Montana fish & wildlife agency |
| June 6, 2012 | Arctic Grayling | 10,000 | 1" | Montana fish & wildlife agency |
| August 11, 2011 | Cutthroat Trout | 2,125 | 1.43" | Montana fish & wildlife agency |
| June 1, 2011 | Arctic Grayling | 25,000 | 1" | Montana fish & wildlife agency |
| June 22, 2010 | Cutthroat Trout | 2,208 | 4.92" | Montana fish & wildlife agency |
| May 25, 2010 | Arctic Grayling | 10,000 | 0.5" | Montana fish & wildlife agency |
| June 16, 2009 | Cutthroat Trout | 2,001 | 3.88" | Montana fish & wildlife agency |
| June 9, 2009 | Arctic Grayling | 11,000 | 1" | Montana fish & wildlife agency |
| September 18, 2008 | Cutthroat Trout | 2,016 | 2.07" | Montana fish & wildlife agency |
| July 18, 2008 | Arctic Grayling | 9,000 | 0.5" | Montana fish & wildlife agency |
| October 2, 2007 | Cutthroat Trout | 1,008 | 2.28" | Montana fish & wildlife agency |
| June 26, 2007 | Cutthroat Trout | 578 | 5.02" | Montana fish & wildlife agency |
| August 10, 2006 | Cutthroat Trout | 2,019 | 4.8" | Montana fish & wildlife agency |
| June 2, 2006 | Arctic Grayling | 10,244 | 0.6" | Montana fish & wildlife agency |
| June 27, 2005 | Arctic Grayling | 11,200 | 0.5" | Montana fish & wildlife agency |
| June 16, 2005 | Cutthroat Trout | 2,058 | 3.65" | Montana fish & wildlife agency |
| August 13, 2004 | Arctic Grayling | 10,900 | 0.8" | Montana fish & wildlife agency |
| July 13, 2004 | Cutthroat Trout | 2,080 | 1.3" | Montana fish & wildlife agency |
| September 5, 2003 | Cutthroat Trout | 2,280 | 1.84" | Montana fish & wildlife agency |
| July 16, 2003 | Arctic Grayling | 11,200 | 0.5" | Montana fish & wildlife agency |
| July 19, 2002 | Cutthroat Trout | 2,100 | 0.8" | Montana fish & wildlife agency |
| July 19, 2002 | Arctic Grayling | 11,900 | 0.5" | Montana fish & wildlife agency |
| June 25, 2001 | Arctic Grayling | 9,800 | 0.8" | Montana fish & wildlife agency |
| September 14, 2000 | Cutthroat Trout | 2,024 | 5.1" | Montana fish & wildlife agency |
| September 6, 2000 | Arctic Grayling | 19,200 | 0.7" | Montana fish & wildlife agency |
| August 17, 1999 | Cutthroat Trout | 2,000 | 1.5" | Montana fish & wildlife agency |
| July 22, 1998 | Cutthroat Trout | 2,188 | 1.1" | Montana fish & wildlife agency |
| August 22, 1997 | Cutthroat Trout | 2,083 | 1.8" | Montana fish & wildlife agency |
| July 22, 1997 | Cutthroat Trout | 2,095 | 1.1" | Montana fish & wildlife agency |
| June 9, 1997 | Arctic Grayling | 21,645 | 0.2" | Montana fish & wildlife agency |
| July 27, 1995 | Arctic Grayling | 21,500 | 0.7" | Montana fish & wildlife agency |
| June 29, 1993 | Arctic Grayling | 20,000 | 0.6" | Montana fish & wildlife agency |
Showing 50 of 66 stocking records.
Frequently asked
When was Sylvia Lake last stocked?
According to Montana fish & wildlife agency, Sylvia Lake was last stocked August 8, 2025 with Cutthroat Trout.
What fish species are stocked in Sylvia Lake?
Sylvia Lake is stocked with Cutthroat Trout, Arctic Grayling, and Rainbow Trout.
What time of year is Sylvia Lake stocked?
Sylvia Lake is typically stocked in summer, most often in June.
How often is Sylvia Lake stocked?
Sylvia Lake is stocked intermittently — 66 recorded stockings between 1929 and 2025.
How many fish have been stocked in Sylvia Lake?
About 758,825 fish have been stocked in Sylvia Lake across 66 recorded events since 1929, per Montana fish & wildlife agency.
What size are the fish stocked in Sylvia Lake?
Fish stocked in Sylvia Lake average about 1.5 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Sylvia Lake?
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 Sylvia Lake?
Freshly stocked trout in Sylvia Lake 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.