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Grindstone Lake Fishing Report

Updated Fri, Oct 23, 2026 from live gauge and weather data

Minnesota's two-story secret: a 60-foot glacial bowl stocked with lake trout, browns and the clarity to sight-fish them all.

3/5
Fair. Fish the windows.A steady pattern: dawn and dusk carry the day.
Water temp
~55 F est.
Air / High
72 / 74 F
Wind
S 17 mph

Sources: Open-Meteo, solunar calculated for these coordinates.

Satellite view
Friday
23
October 2026

Today's Fishing Report

Generated this morning from live readings: gauge, weather model, sun and moon. A fresh report is published here every morning.

3/5Fair. Fish the windows.A steady pattern: dawn and dusk carry the day.

Grindstone Lake rewards those who follow the bait as the water cools. Today brings clear skies, wind S around 17 mph, steady pressure near 1018 hPa and a high of 74. Water sits around 55 F for the season (estimated). With the waxing gibbous, the solunar majors run 9:47 AM-11:47 AM and 10:17 PM-12:17 AM: the windows to build the day around.

The plan, species by species

Lake troutGood

Spring and fall bring lakers into 10 to 30 feet of water (Michigan DNR), within reach of casters and shallow trollers; fall is also spawning time over rocky shoals.

Smallmouth bassGood

Spring pre-spawn and fall: Iowa DNR notes the larger bass come up to shallow structure, where a shallow-running minnow bait or a spinnerbait just under the surface works.

Northern pikeGood

The best band for pike: right after ice-out they move into flooded vegetated shallows to spawn, and they feed actively again as the water cools in fall.

Yellow perchGood

Spring and fall: perch hold shallower and, by Michigan DNR's account, feed through the day, so shoreline weed edges, flats and the shallows near spawning areas are worth searching.

Tomorrow: Cooler at 68 F with a rain chance. The solunar majors shift about 50 minutes later.Next report: Sat, Oct 24, 6:30 AMHow this report is made β†’

Before you go

Minnesota requires a fishing licence from age 16, from $25.00 for residents. What a Minnesota licence costs and where to buy it β†’

Chasing lake trout here? Check the size and bag limits with DNR before you keep anything. The season dates for Minnesota, read off the agency, are on the Minnesota seasons page.

Water and weather

Live readings.

No live gauge on this water

Conditions here are modeled from weather, season and the nearest stations. Water readings appear when a USGS gauge is available.

304050607080JanMarMayJulSepNovOct, ~55 F now

Right now

Latest readings

Air temp72 F
High / Low74 / 43 F
WindS 17-27 mph
Pressure1018.0 hPa, steady
Sky / Rain20% cloud, 25%
Sunrise / Sunset07:39 / 18:11
MoonWaxing Gibbous, 91%
Water temp (seasonal)~55 F est.

Bite planner

Hour-by-hour bite forecast for today. Tap a bar to see why.

5 AM8 AM11 AM2 PM5 PM8 PMsunrisesunsetPRIMEPRIME

Which day to fish Grindstone Lake this week

The best day on Grindstone Lake this week looks like Saturday Oct 24, at 4 out of 5, against 3 today.

Best day this week: Saturday, Oct 24 β€” good at 4/5, falling pressure, usually the best window of a week.

Today, Oct 23 β€” Fair

A steady pattern: dawn and dusk carry the day.

Solunar majors
9:47 AM-11:47 AM and 10:17 PM-12:17 AM
Minor period
4:10 AM-5:10 AM
Sun
07:39 to 18:11
Moon
Waxing Gibbous, 91% lit
Sky and wind
Showers, 16 mph
Rain chance
25%

Forecast-based scores, less reliable further out: how the score is built.

Species guide

The species that matter on Grindstone Lake: seasons, structure and how to fish each one. Today's ratings live in the report above.

Lake trout illustration

Lake trout

Spring and fall in shallow water, deep in summer, and through the ice in winter

Lake trout are slow-growing chars of large, deep, cold lakes, native from Alaska and northern Canada to New England and the Great Lakes, and introduced in many western lakes. Spring and fall bring lakers into 10 to 30 feet of water (Michigan DNR), within reach of casters and shallow trollers; fall is also spawning time over rocky shoals.

Smallmouth bass illustration

Smallmouth bass

Best: spring and fall, when bigger fish come shallow

A bronze-brown black bass of clear, cool streams and rocky lakes, with dark vertical bars instead of a side stripe. Michigan DNR says its southeastern coast, from Port Huron to Lake Erie, is known nationally for both the size and the number of its smallmouth. Spring pre-spawn and fall: Iowa DNR notes the larger bass come up to shallow structure, where a shallow-running minnow bait or a spinnerbait just under the surface works.

Northern pike illustration

Northern pike

Best: cool water, from ice-out through spring, in fall and under the ice

A long, duck-billed predator of weedy lakes, slow rivers and backwaters that ambushes fish from vegetation. Wisconsin DNR points out that, unlike most of the state's common game fish, pike do their best feeding in cool water. The best band for pike: right after ice-out they move into flooded vegetated shallows to spawn, and they feed actively again as the water cools in fall.

Yellow perch illustration

Yellow perch

Caught all year, including under the ice through winter

Yellow perch are schooling panfish of the Great Lakes and northern lakes, and Michigan DNR calls them the game fish most often caught in that state. Spring and fall: perch hold shallower and, by Michigan DNR's account, feed through the day, so shoreline weed edges, flats and the shallows near spawning areas are worth searching.

When to come: the Grindstone Lake calendar

Activity by species and month, and how the water warms through the year. Tap any cell.

Species activity by month

1 = slow, 5 = peak. Current month highlighted.

J
F
M
A
M
J
J
A
S
O
N
D
Lake trout
Smallmouth bass
Northern pike
Yellow perch
SlowPeak

Water temperature through the year

Typical surface temperature for this water type; today is around 55 F (estimated, not a reading).

304050607080JanMarMayJulSepNovOct, ~55 F now

Angler reports

Real reports from real anglers, reviewed before publishing. The water log below tracks each day automatically.

No angler reports yet this weekBe the first: your report helps every angler who checks Grindstone Lake today, and we feature the best catch of the week.

Water log, last days

Auto-logged from live data
Thu, Oct 22

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Lake trout led the card at good. High of 73 F, wind to 7 mph.

Wed, Oct 21

4/5 Good. Solid day ahead. Stable-to-falling pressure and workable wind line things up. Lake trout led the card at excellent. High of 72 F, wind to 7 mph.

Tue, Oct 20

4/5 Good. Solid day ahead. Stable-to-falling pressure and workable wind line things up. Lake trout led the card at excellent. High of 67 F, wind to 12 mph.

Where roughly, what depth, what bait. Skip anything you want to keep secret.
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Before you go

License

Minnesota requires a valid fishing license for adults. Buy online from the state agency; one-day options exist for visitors.

Regulations

Minnesota license + trout stamp. Lake trout/brown seasons and gear rules lake-specific: check DNR signage.

Access

Public access (east shore), resort landings; winter per local ice guidance.

About this water

528 deep-glacial acres, Pine County, MN. The metro's closest lake-trout water.

Fishing Grindstone Lake: the full guide

The deep anomaly

Grindstone drops 60 feet clear in Pine County: a two-story rarity managed for lake trout and brown trout over its smallmouth-and-panfish base: the metro's closest legitimate laker water (90 minutes from the Cities) and among its clearest anything.

The cold-water program

DNR's lakers and browns ride the depths: jigged through winter ice (the lake's marquee season: white tubes over 40-55 feet), trolled at the thermocline through summer (leadcore and spoons at 30-50). The browns cruise shallower dawn windows: flat-lined sticks along the drop in May and October convert.

Clear-water margins

Smallmouth work the boulder edges (sight-fishing in the visibility: long casts mandatory), largemouth hold the modest cabbage, and the panfish rafts school deep and finicky: 6-pound-test water throughout. The clarity that draws divers (a local site) sets the fishing's terms.

Pine County practicalities

The public access serves modest traffic (the lake stays quiet by metro standards): special regulations protect the trout (check the sign: seasons and gear notes): and winter access follows the resorts' guidance: the deep bowl's ice needs respect at the edges. Hinckley's services sit ten minutes west.

Common questions

Does Grindstone really have lake trout?

Stocked and thriving in the 60-foot bowl: winter jigging is the classic program. It is the Twin Cities' shortest drive to legitimate lakers.

Why is Grindstone so clear?

Glacial depth and springs with minimal inflow: visibility runs diver-grade. Fish it like mountain water: light line, long casts, low light.

Is fishing good at Grindstone Lake right now?

Check the daily report at the top of this page: it is regenerated every morning from live data. Today's read: Fair. Fish the windows. A steady pattern: dawn and dusk carry the day.

Nearby waters

Leech Lake33 miMille Lacs Lake37 miSaint Croix River52 miNamekagon River68 miBois Brule River69 miGull Lake72 mi

Where this page's numbers come from

Weather and pressure
Open-Meteo forecast model
Queried at 46.1300, -92.9000 in this water's own timezone. A model, not an observation.
Moon and solunar windows
Calculated on this site
Astronomical calculation from these coordinates and the date, not a third-party feed. How much weight it deserves.
The written guide on this page
Pablo Ruiz Quintero
How this page was made. The daily report is computed by our scoring engine from live readings; nobody types it. The written guide was drafted with AI assistance. Unlike our newer pages, it does not yet list the official pages its facts were checked against: that audit is under way, and anything it cannot verify will be taken out. Pablo Ruiz Quintero sets every guideline, the data-verification system and the minimum standards a page must meet to be published, reviews page structure and approves what goes live; the responsibility is his, and the AI carries out the work. We work this way because it is how one person can keep every page current with named sources. Errors are published in the verification log; the full policy is in the editorial policy.

Readings refresh on a 30-minute window. The full method, with every figure and its source, is on how our reports are made. Something wrong here? Tell us and it goes in the log with the date.