Last stocked
June 16, 2026
Plants on record
78
Since 2011
Species recorded
4
Average size
3 in
Elevation
3,702.4 ft
Access and facts
- Nearest town
- Dayton
- Boat ramp
- Yes
- ADA accessible
- Yes
- Fee required
- Yes
- Facilities
- restrooms, camping, dock
Lake Mary Ronan State Park has a boat launch and dock, 25 campsites with seasonal electricity, vault toilets, and ADA-accessible facilities. About 8 miles northwest of US-93 at Dayton, seven miles west of Flathead Lake.
Sources: access , shore_notes , nearest_town , facilities , fishing_notes , watch_outs
How Lake Mary Ronan is stocked
The first plant of the year usually falls in the second week of May. In 2026 it was June 16, 2026, later than usual.
Fish at Lake Mary Ronan
Fishing Lake Mary Ronan is most likely to be for Kokanee Salmon. Kokanee Salmon accounts for 38 of 78 plants on record, ahead of Rainbow Trout and 2 more.
Around the dates Lake Mary Ronan is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 51.9°F in May, 59.9°F in June, 69.2°F in July, 41.2°F in April. That is air temperature at these coordinates, not water temperature. Open-Meteo
Kokanee Salmon 38 plants
- Plants
- 38 of 78
- Last stocked
- May 16, 2024
- Average length
- 2.3 in
Rainbow Trout 28 plants
- Plants
- 28 of 78
- Last stocked
- June 16, 2026
- Average length
- 4.2 in
Largemouth Bass 11 plants
- Plants
- 11 of 78
- Last stocked
- August 8, 2024
- Average length
- 1.9 in
Cutthroat Trout 1 plant
- Plants
- 1 of 78
- Last stocked
- July 11, 2011
- Average length
- 8.6 in
Fishing Lake Mary Ronan
Lake Mary Ronan State Park is noted for its fishing. It offers an angler’s delight with kokanee salmon, yellow perch and large mouth bass. Activities at Lake Mary Ronan State Park include Fishing, Ice Fishing, and Lake Fishing.
Sources: fwp.mt.gov
What to watch for
Visitors should store all attractants, day or night, in a closed, hard sided container or vehicle when not in immediate use, and dispose of garbage in bear-resistant dumpsters provided. Also, anglers and boaters must protect Montana's waters from Aquatic Invasive Species, which can be unknowingly transported on equipment.
Fish stocked per year
- 385,6252011
- 522,1332012
- 458,8032013
- 46,2052014
- 427,1402015
- 401,7242016
- 434,2412017
- 40,0002018
- 430,0002019
- 459,7852020
- 421,9482021
- 403,9392022
- 367,7052023
- 387,5222024
- 30,0002025
- 27,1442026
Stocking history
Showing 15 of 78 plants Showing 78 plants
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| June 16, 2026 | Rainbow Trout | 13,572 | 3.63 in | report |
| June 16, 2026 | Rainbow Trout | 13,572 | 3.63 in | report |
| June 23, 2025 | Rainbow Trout | 30,000 | 3.3 in | report |
| August 8, 2024 | Largemouth Bass | 27,522 | 1.26 in | report |
| June 10, 2024 | Rainbow Trout | 30,000 | 3.29 in | report |
| May 16, 2024 | Kokanee Salmon | 50,000 | 2.6 in | report |
| May 13, 2024 | Kokanee Salmon | 30,000 | 3.39 in | report |
| April 19, 2024 | Kokanee Salmon | 250,000 | 2.5 in | report |
| September 5, 2023 | Largemouth Bass | 13,266 | 2.59 in | report |
| August 17, 2023 | Largemouth Bass | 14,300 | 1.59 in | report |
| June 13, 2023 | Rainbow Trout | 30,139 | 3.07 in | report |
| May 5, 2023 | Kokanee Salmon | 310,000 | 2.5 in | report |
| June 15, 2022 | Rainbow Trout | 27,187 | 3.7 in | report |
| June 8, 2022 | Kokanee Salmon | 376,752 | 2.29 in | report |
| July 29, 2021 | Largemouth Bass | 25,000 | 1.68 in | report |
| May 27, 2021 | Rainbow Trout | 29,850 | 3.47 in | report |
| May 20, 2021 | Kokanee Salmon | 367,098 | 2.75 in | report |
| July 22, 2020 | Largemouth Bass | 25,000 | 3 in | report |
| June 17, 2020 | Rainbow Trout | 34,785 | 3.3 in | report |
| May 26, 2020 | Kokanee Salmon | 400,000 | 3 in | report |
| July 2, 2019 | Rainbow Trout | 30,000 | 3.22 in | report |
| May 30, 2019 | Kokanee Salmon | 400,000 | 2.5 in | report |
| July 14, 2018 | Largemouth Bass | 10,000 | 1.7 in | report |
| May 21, 2018 | Rainbow Trout | 30,000 | 3.59 in | report |
| August 23, 2017 | Largemouth Bass | 25,000 | 1.96 in | report |
| July 12, 2017 | Rainbow Trout | 30,218 | 3.96 in | report |
| June 20, 2017 | Kokanee Salmon | 22,567 | 2.2 in | report |
| May 30, 2017 | Kokanee Salmon | 68,890 | 2.51 in | report |
| May 17, 2017 | Kokanee Salmon | 160,017 | 2.21 in | report |
| May 10, 2017 | Kokanee Salmon | 65,513 | 2.02 in | report |
| May 10, 2017 | Kokanee Salmon | 62,036 | 2.12 in | report |
| September 16, 2016 | Rainbow Trout | 5,001 | 4.1 in | report |
| August 4, 2016 | Largemouth Bass | 25,000 | 1.43 in | report |
| July 21, 2016 | Rainbow Trout | 27,972 | 3.64 in | report |
| May 26, 2016 | Kokanee Salmon | 32,500 | 2.25 in | report |
| May 20, 2016 | Kokanee Salmon | 59,241 | 2.19 in | report |
| May 16, 2016 | Kokanee Salmon | 27,354 | 2.13 in | report |
| May 16, 2016 | Kokanee Salmon | 35,865 | 2.21 in | report |
| May 3, 2016 | Kokanee Salmon | 52,412 | 2.03 in | report |
| May 2, 2016 | Kokanee Salmon | 48,293 | 2.05 in | report |
| April 28, 2016 | Kokanee Salmon | 36,180 | 2 in | report |
| April 7, 2016 | Kokanee Salmon | 51,906 | 1.5 in | report |
| July 30, 2015 | Largemouth Bass | 25,000 | 1.5 in | report |
| June 25, 2015 | Rainbow Trout | 3,612 | 4.59 in | report |
| June 25, 2015 | Rainbow Trout | 23,220 | 4.59 in | report |
| June 25, 2015 | Rainbow Trout | 1,698 | 4.45 in | report |
| June 18, 2015 | Kokanee Salmon | 81,803 | 2.6 in | report |
| June 9, 2015 | Kokanee Salmon | 68,200 | 2.1 in | report |
| June 8, 2015 | Kokanee Salmon | 5,271 | 2.5 in | report |
| May 8, 2015 | Kokanee Salmon | 50,337 | 2.2 in | report |
| May 5, 2015 | Kokanee Salmon | 48,150 | 2.5 in | report |
| April 30, 2015 | Kokanee Salmon | 69,849 | 2.5 in | report |
| April 16, 2015 | Kokanee Salmon | 50,000 | 2 in | report |
| September 16, 2014 | Rainbow Trout | 558 | 5.69 in | report |
| September 16, 2014 | Rainbow Trout | 1,500 | 4.97 in | report |
| August 21, 2014 | Largemouth Bass | 25,000 | 2 in | report |
| June 30, 2014 | Rainbow Trout | 19,147 | 3.77 in | report |
| July 17, 2013 | Largemouth Bass | 25,000 | 2.3 in | report |
| June 27, 2013 | Rainbow Trout | 23,100 | 4.2 in | report |
| May 28, 2013 | Rainbow Trout | 9,308 | 3.53 in | report |
| May 14, 2013 | Rainbow Trout | 950 | 10.47 in | report |
| May 1, 2013 | Kokanee Salmon | 400,445 | 2 in | report |
| September 19, 2012 | Rainbow Trout | 5,524 | 5.38 in | report |
| May 23, 2012 | Rainbow Trout | 31,237 | 3.62 in | report |
| May 21, 2012 | Kokanee Salmon | 263,927 | 2.5 in | report |
| May 8, 2012 | Rainbow Trout | 5,078 | 3.4 in | report |
| April 20, 2012 | Kokanee Salmon | 84,360 | 2 in | report |
| April 10, 2012 | Kokanee Salmon | 132,007 | 2 in | report |
| September 21, 2011 | Rainbow Trout | 5,185 | 4.9 in | report |
| September 21, 2011 | Rainbow Trout | 4,815 | 4.32 in | report |
| July 11, 2011 | Cutthroat Trout | 5,000 | 8.57 in | report |
| June 16, 2011 | Kokanee Salmon | 30,500 | 2 in | report |
| June 16, 2011 | Kokanee Salmon | 18,605 | 2 in | report |
| June 10, 2011 | Kokanee Salmon | 35,460 | 2 in | report |
| May 25, 2011 | Rainbow Trout | 30,128 | 4.05 in | report |
| May 25, 2011 | Kokanee Salmon | 129,120 | 2 in | report |
| May 3, 2011 | Kokanee Salmon | 87,962 | 2 in | report |
| May 2, 2011 | Kokanee Salmon | 38,850 | 2 in | report |
Show 63 more plants Show less
Species stocked here
Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.