Lake Mary - Mammoth Lakes, CA

Lake Information

Fish Species: Rainbow Trout, Brown Trout, Brook Trout
Lake Mary, the largest of the Mammoth Lakes, offers expansive and productive stillwater fly fishing in an easily accessed alpine setting. At 8,900 feet elevation and covering 140 acres, the lake holds rainbow and brown trout, with regular stocking and strong holdover potential.

Spring and early summer are prime times to fly fish Lake Mary. Post-ice-out trout feed actively in the shallows, making indicator rigs with leeches, midges, and chironomids highly effective. As summer progresses, dry fly opportunities emerge with callibaetis, caddis, and terrestrials providing topwater action, especially during calm mornings.

Fall is a favored time for fly anglers, as cooling water temps bring trout back into the shallows and trigger pre-spawn aggression in browns. Streamer fishing along rocky shorelines and drop-offs can yield larger fish during this period.

Float tubes and small boats enhance access, though the lake also offers decent shoreline casting in several areas. Productive zones include the inlet, western points, and deeper rocky pockets. The lake is managed for recreation, so fly anglers often find the best success in the early morning or mid-week when pressure is lower.

Lake Mary is a top-tier option for those looking for a fly fishing lake with consistent action, easy access, and breathtaking Sierra scenery.



Latest Photos

5 lbs. 12 oz.
Dave Payetta
6-3-2025
5 lbs.
5-27-2025
10-5-2024
10-4-2024

Lake Mary Whoppers

Species Weight Date Report
Rainbow Trout 10 lbs. 8 oz. 11-01-2023 View Report
Rainbow Trout 10 lbs. 7-30-2019 View Report
Rainbow Trout 10 lbs. 7-22-2020 View Report
Rainbow Trout 8 lbs. 6-26-2020 View Report
Rainbow Trout 8 lbs. 10-17-2023 View Report
Rainbow Trout 7 lbs. 12 oz. 10-13-2023 View Report
Rainbow Trout 7 lbs. 8-02-2023 View Report
Rainbow Trout 6 lbs. 8 oz. 7-17-2020 View Report
Rainbow Trout 6 lbs. 7 oz. 7-22-2020 View Report
Rainbow Trout 6 lbs. 8-16-2023 View Report

Latest Fish Plants

Plant DateSpeciesSourceTotal Pounds
6-02-2025Rainbow TroutCDFW 
9-22-2024Rainbow TroutCDFW 
9-08-2024Rainbow TroutCDFW 
8-11-2024Rainbow TroutCDFW 
7-08-2024Rainbow TroutCDFW 


Latest Fish Reports

Date Report Author
6-3-2025 5 3/4lb rainbow trout
On Saturday, Dave Payetta from Seal Beach, CA,... more »
Lake Mary Marina
5-27-2025 5 lb. Rainbow
                On Friday, Valerie and John Doom from Los... more »
Lake Mary Marina
5-27-2025 11 lbs of rainbow trout with a cowbell and crawler
On Saturday, Maci and Christian Wrathall from LaHabra,... more »
Lake Mary Marina
5-27-2025 5.5 lb. Raibow
On Saturday, our good friend Alexis Sugasawara caught... more »
Lake Mary Marina
5-23-2025 Check out the first catch of the season at Lake Mary Marina
Check out the first catch of the season... more »
Lake Mary Marina

Detailed Map