TroutlineKnow your water.
RiversLakesStatesSnowpackStocking
Troutline

Know your water.

Live river and lake conditions, the forecast and a logbook, for fly anglers.

Explore

  • Rivers
  • Lakes
  • States
  • Snowpack
  • Stocking

Troutline

  • Premium
  • FAQ
  • Sources

Account

  • Create account
  • Sign in
© 2026 TroutlineTermsPrivacy
Every number traces to a public source: all 39 of them.
  1. Home
  2. /California
  3. /Grant Lake

California

Grant Lake

California·Eastern Sierra·37.85° N, 119.11° W
Log an outing

Solunar · next 7 days

About Grant Lake

Grant Lake is the reservoir at the north end of the June Lake Loop, and it is a different animal from the three natural lakes south of it. LADWP built an 87-foot earth dam across Rush Creek in 1940 and turned a lake of about 150 acres into roughly 1,100 acres and 47,525 acre-feet, close to four miles long at 7,130 feet. CDFW planted rainbows five times between the April opener and mid-July in 2026, and the June Lake Loop Trophy Trout Program adds bigger fish. The reason a fly angler comes here, though, is the browns. They spawn in Rush Creek above the lake, grow fat on planted rainbows and Sacramento perch, and get very large: a 20 lb brown came out of Grant in 1991, and fish over 10 lb are still possible.

Treat it as a reservoir, not a pond. Los Angeles moves this water around, and storage has swung from about a quarter full (11,800 acre-feet in April 2022) to brim full in 2024 and again in spring 2026. In dry years the shoreline backs a long way off the ramp and the weed lines you found last season may be dry ground, so check the level before you drive up. The fishing is mostly streamers. Swim a sculpin, a leech or a Woolly Bugger on an intermediate or full sinking line along the steep drop-offs. The best brown windows are early May, right after the opener, and from September to the close, when the browns push toward the Rush Creek inlet to spawn. On summer mornings an indicator chironomid or a callibaetis nymph on the flats at the south end will keep the rainbows busy. In August the fish go deep, so fish the first hours down the channel through the middle.

Grant is the one loop lake where water skiing and personal watercraft are allowed, after 10 a.m., and the afternoon wind and summer thunderstorms come up fast on this open water. Fish the morning and get small boats off early. Grant Lake Marina at the narrows on the west shore has the ramp, rental boats and float tubes, and camping from the opener to mid-October. After it closes, a float tube or your own boat is the only way out, and late fall is when the browns feed shallow enough for a tube. Sierra Drifters guides the lake by float tube, drift boat and powerboat if you want someone who knows where the fish sit at the current level.

Species

  • Brown Trout
    Common · Early May, Sep-Nov · 16-26", 10 lb+ possible

    Wild and self-sustaining. They spawn in Rush Creek above the lake and feed on planted rainbows and perch, which is how Grant produced a 20 lb brown in 1991. Most catchable in early May and during the fall spawn run toward the inlet.

  • Rainbow Trout
    Abundant · Late Apr-Jun, Sep-Oct · 12-14" planters, trophy plants 3-5 lb

    Planted by CDFW from the opener into July, with trophy fish from the June Lake Loop Trophy Trout Program and Mono County. The fish most people catch, and food for the big browns.

  • Lahontan Cutthroat Trout
    Uncommon · Spring and fall · 14-20"

    A few show up each year. The marina reported a 2 lb cutthroat in August 2026.

SpeciesAbundanceBest SeasonSize
Brown TroutCommonEarly May, Sep-Nov16-26", 10 lb+ possible
Rainbow TroutAbundantLate Apr-Jun, Sep-Oct12-14" planters, trophy plants 3-5 lb
Lahontan Cutthroat TroutUncommonSpring and fall14-20"

Areas

4 areas

Rush Creek inlet

Shore & BoatBeginnerBrown Trout

The south end, where Rush Creek comes in from Silver Lake. Shallower than the rest of the lake, with flats that grow chironomids and callibaetis, and the place browns stack up before they run the creek to spawn in the fall. The most consistent water on Grant, and the first place to go when the level is low.

Best for: Indicator chironomids on summer mornings, big streamers for staging browns from September on

The Narrows

Shore & BoatBeginner

The tight channel, barely 500 feet across, that joins the south basin to the main lake just below the marina. Fish move through it between the two halves, and it is a short run from the ramp.

Best for: Leeches and Woolly Buggers on an intermediate line, early before the ski boats

Main basin drop-offs

BoatIntermediateRainbow Trout

The big open middle of the lake north of the marina, with a deep channel down the center and steep edges along both shores. This is where the trout go in July and August, and where the afternoon wind builds the biggest chop.

Best for: Sculpin and leech patterns on a full sinking line along the drop-offs in midsummer

Dam bay

BoatIntermediateBrown Trout

The small bay at the north end, just inside Grant Lake Dam. A long run up the lake from the marina, and it sees fewer boats than the south half. Big browns come out of it, mostly in spring and fall.

Best for: Big streamers at first and last light in May and from September to the close

Access

  • Grant Lake Campground rampBoat ramp

    The marina's launch ramp. $10 launch fee, paid at the marina store. Low water leaves the end of the ramp far from the lake

  • Grant Lake MarinaMarina

    Docks, rental fishing boats and float tubes, store, cafe, fuel and a fish cleaning station. Open from the opener to mid-October

  • Grant Lake CampgroundCampground

    The marina's campground on the west shore, with showers. Same season as the marina

At a glance

Ideal water temp
48–64°F
Best seasons

Early May, after the late-April opener, for browns on streamers, and September to the close on November 15, when the browns move toward Rush Creek to spawn. June and July mornings fish well on chironomids at the south end. August is deep-water fishing at first light.

Regulations

Grant Lake has its own entry in the CDFW inland regulations (section 7.50(b)): open from the last Saturday in April through November 15 with a 5-trout limit. Rush Creek has two different rules: the inlet stream above the lake opens later, and the creek below the dam is catch and release all year. Confirm the current regulations before fishing.

  • Grant Lake: open from the last Saturday in April through November 15
  • Grant Lake: daily limit 5 trout, no minimum size. Bait, lures and flies are all legal
  • Rush Creek from Silver Lake to Grant Lake (the inlet): open from the Saturday before Memorial Day through September 30, 5 trout, section 7.50(b)(124)(B)
  • Rush Creek from Grant Lake Dam to Mono Lake: open all year, artificial lures with barbless hooks only, 0 trout
  • Boat speed limit 10 mph until 10 a.m. After 10 a.m., water skiing, wakeboarding and personal watercraft are allowed
  • Trailered boats launched in Mono County need the 2026 Eastern Sierra mussel sticker and an inspection. Hand-launched craft such as float tubes and kayaks must arrive clean, drained and dry. Check the county rules for small craft before you go.
  • Grant Lake Marina charges a $10 launch fee and is open from the opener to mid-October
  • Valid California fishing license required for anglers 16 and older

Source: California Department of Fish and Wildlife, 2026 Freshwater Sport Fishing Regulations, section 7.50(b). Regulations change annually. Verify before fishing.

Getting there

June Lake, CA

About 15 min from Lee Vining via the north end of CA-158, about 30 min from Mammoth Lakes around the loop from the south end, and about 5 to 6 hrs from Los Angeles

Fly shops

  • The TroutfitterMammoth Lakes

Camping: Grant Lake Marina has a campground with showers on the west shore, open with the marina. More campgrounds sit along CA-158 at Silver Lake and in June Lake village, with cabins and lodging in June Lake and Mammoth Lakes.

CA-158 runs the west shore, so there is roadside shore access, but wading room is limited and the banks are steep in places. A low level puts the water far from the road and the ramp. Sierra Drifters runs guided trips on the lake.

Fishing reports

Recent reports from local fly shops, guides & lodges on Grant Lake. Each links out to the source.

No recent fishing reports for Grant Lake

We aggregate reports from local fly shops, guides, and lodges as they publish. Check back, or browse the shops on the Guide tab.

More in California

View all 30 lakes

Eastern Sierra

Boca Reservoir

5 mph wind28% full

Good

Bridgeport Reservoir

5 mph wind23% full

Good

Convict Lake

15 mph wind

Good

Crowley Lake

5 mph wind58% full

Good

Ellery Lake

20 mph wind

Slow

Gull Lake

5 mph wind

Good

June Lake

15 mph wind

Slow

Lake George

15 mph wind

Slow

Lake Mamie

15 mph wind

Slow

Lake Mary

15 mph wind

Slow

Lake Sabrina

13 mph wind

Fair

Lundy Lake

15 mph wind

Slow

Martis Creek Lake

5 mph wind4% full

Good

Pleasant Valley Reservoir

9 mph wind

Good

Prosser Creek Reservoir

5 mph wind40% full

Good

Rock Creek Lake

13 mph wind

Fair

Saddlebag Lake

20 mph wind

Slow

Silver Lake

10 mph wind

Good

South Lake

10 mph wind

Good

Stampede Reservoir

5 mph wind62% full

Prime

Tioga Lake

20 mph wind

Slow

Topaz Lake

5 mph wind−0.5 ft level

Good

Twin Lakes

20 mph wind−0.2 ft level

Slow

Virginia Lakes

20 mph wind

Slow

Other regions

Eagle Lake

0 mph wind

Good

Frenchman Lake

5 mph wind74% full

Prime

Lake Almanor

0 mph wind68% full

Good

Lake Davis

0 mph wind80% full

Good

Lewiston Lake

5 mph wind94% full

Prime
Fishing
Good
Wind
5mph S
Gusts 16 mph
Water temp
About53°F
Estimated surface
Level
97% full
Filling this week

Fishing conditions

Good
PoorSlowFairGoodPrime
How we rate this
Tue
10/27
—
MDE
Wed
10/28
—
MDE
Thu
10/29
—
MDE
Fri
10/30
—
MDE
Sat
10/31
—
MDE

MmorningDmiddayEevening

poorprime

Today
morning6:16a – 11:16aGoodRising pressureFull moon
midday11:16a – 2:06pGoodWindy, gusts to 22 mphFull moon
evening2:06p – 7:06pGoodWindy, gusts to 22 mphFalling pressure
Measured
About 53°F, ideal, estimatedFall turnoverFilling

See the 5-day fishing forecast for the Grant Lake

The Fish Index rates each day from the flow, water temperature, weather and moon forecasts. Create a free account to see the days ahead on every river and lake.

A free account also gets you

  • A dashboard for your watersSave your rivers and lakes and compare them on one board, with the last week and the days ahead.
  • A logbook that fills in the conditionsLog outings and trips with photos. Troutline adds the flow, water temperature and weather for each day.
  • Your angler profileSee other anglers' public outings, and share yours.

Already have an account?

Want history, unlimited alerts and more? , with the first 14 days free for new members.