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Rating depth structure for largemouth bass.
Recent public catches load as you reach this section.
35-acre lake near Piermont. NH GRANIT / NH Fish & Game survey water. The lake tops out around 15 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. What follows comes from the same scoring engine that paints the spots above.
Katherine Lake maps at 35 acres behind 1 miles of shoreline. Its 1.2 shoreline index means few bank features; the contours below do the pattern work. Figure 0.4 mi of water from one end to the other, 0.2 mi at the beam. Grafton County claims this one. Its nearest charted neighbour, Tarleton Lake, is 1 mi to the southeast.
Start shallow in spring: yellow perch sit in 3 to 12 ft that time of year. Summer pushes them deeper, 5 to 15 ft, and winter fish settle into 5 to 15 ft. The spot to know is Shallow bay flat, a weed flat in about 4 ft of water that rates prime for yellow perch in spring. Warm-month bites cluster around early morning. Throw a drop-shot micro plastics or a small spoon tipped with worm until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (4 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 5 to 15 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (15 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 5 to 15 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (15 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 5 to 15 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (15 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Come spring, look for smallmouth bass tight to the bank in 3 to 12 ft. Expect a summer slide to 5 to 15 ft, then a winter hold in 5 to 15 ft. Start at Break off the point. It's a drop-off holding about 11 ft of water and rates prime come winter. Prime time lands in early morning and the evening. A drop shot (goby/minnow) or a ned rig is the honest summer answer here.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Main-lake point (4 ft) | Ned rig, Tube jig |
| Summer | 5 to 15 ft chart-limited; documented 10 to 30 ft | dawn & dusk | Break off the point (11 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 5 to 15 ft chart-limited; documented 8 to 25 ft | midday & dawn | Break off the point (11 ft) | Jerkbait, Blade bait |
| Winter | 5 to 15 ft chart-limited; documented 20 to 45 ft | midday | Break off the point (11 ft) | Blade bait, Hair jig |
When the water first warms, largemouth bass slide up into 2 to 10 ft. By summer they slide out to 5 to 15 ft, and by winter most fish are in 5 to 15 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 4 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Keep a texas-rigged 10" worm or a deep-diving crankbait rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (4 ft) | Spinnerbait, Chatterbait |
| Summer | 5 to 15 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Break off the point (11 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (4 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 5 to 15 ft chart-limited; documented 15 to 35 ft | midday | Break off the point (11 ft) | Blade bait, Jigging spoon |
Spring white perch on Katherine Lake hold shallow, usually 4 to 15 ft. Depth-wise the year is flat: 5 to 15 ft in summer, 5 to 15 ft once it turns cold. Put Deep basin first on the milk run — a deep basin near 15 ft that grades prime for summer. The feeding windows run early morning. The summer box starts with a small spinner rig drifted or a 1/8 oz jigging spoon.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk | Shallow bay flat (4 ft) | Small jig + curly tail, Inline spinner (silver) |
| Summer | 5 to 15 ft chart-limited; documented 15 to 40 ft | dawn | Deep basin (15 ft) | Small spinner rig drifted, 1/8 oz jigging spoon |
| Fall | 5 to 15 ft chart-limited; documented 15 to 45 ft | midday | Deep basin (15 ft) | Jigging spoon (small), Blade bait |
| Winter | 5 to 15 ft chart-limited; documented 20 to 50 ft | dusk | Deep basin (15 ft) | Small rattle spoon, Tungsten + spikes |
When the water first warms, brown bullhead slide up into 2 to 8 ft. Summer is a 3 to 12 ft game here, winter a 5 to 15 ft one. Start at Deep basin. It's a deep basin holding about 15 ft of water and rates prime come winter. The feeding windows run after dark and the evening.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Shallow bay flat (4 ft) | |
| Summer | 3 to 12 ft | night & dusk | Shallow bay flat (4 ft) | |
| Fall | 5 to 15 ft | dusk | Deep basin (15 ft) | |
| Winter | 5 to 15 ft chart-limited; documented 10 to 25 ft | midday | Deep basin (15 ft) |
The spring pattern is a shallow one: chain pickerel in 2 to 10 ft. As the season builds they drop to 3 to 15 ft, wintering in 4 to 15 ft. Top water on the chart: Shallow bay flat, a weed flat in the 4 ft range, prime in spring. Time it for early morning and the evening. Summer baits: a weedless spoon + trailer or a buzzbait gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday & dawn | Shallow bay flat (4 ft) | Inline spinner (silver), Small spoon (red/white) |
| Summer | 3 to 15 ft | dawn & dusk | Shallow bay flat (4 ft) | Weedless spoon + trailer, Buzzbait |
| Fall | 4 to 15 ft | midday & dawn | Shallow bay flat (4 ft) | Jerkbait along weed edges, Spinnerbait |
| Winter | 4 to 15 ft chart-limited; documented 5 to 18 ft | dawn | Shallow bay flat (4 ft) | Jigging spoon (through ice) |
Structure-wise the chart holds 5 features, led in depth by Deep basin at roughly 15 ft.
Access data: New Hampshire Fish & Game — Public Access Sites. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for New Hampshire waters are set by the New Hampshire Fish and Game — and special regulations can apply to Katherine Lake specifically, so confirm the current rules before you fish.
Check the official New Hampshire fishing regulations →
Katherine Lake is about 15 ft (5 m) deep at its deepest point. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target yellow perch, smallmouth bass, largemouth bass, white perch, brown bullhead, chain pickerel on Katherine Lake. This isn't a survey of the lake — none is on record for it — but an informed estimate from the species listed for the nearest surveyed lakes in the region, filtered to this lake's depth and habitat.
Shallow bay flat is the top-rated area: a weed flat in about 4 ft of water that rates prime for yellow perch in spring. Open the map above to see every rated spot for each species and season.
For yellow perch, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Katherine Lake is regulated by the New Hampshire Fish and Game. Check the official New Hampshire regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Tarleton Lake 1 mi · Armington Lake 2 mi · WACHIPAUKA POND (Meader Pond) 3 mi · OLIVERIAN BROOK POND 3 mi · Indian Pond 5 mi · Baker Pond, Upper 5 mi · Baker River Site 2 5 mi · WOOD POND 5 mi · Lower Baker Pond 6 mi · BAKER RIVER, SITE 6A 9 mi · UPPER MOUNTAIN LAKE 9 mi · Lake Morey 9 mi, VT
See how Katherine Lake stacks up: best largemouth bass lakes in New Hampshire · best smallmouth bass lakes in New Hampshire · best yellow perch lakes in New Hampshire · best chain pickerel lakes in New Hampshire
More water nearby: Grafton County fishing maps (56 charts). Browse all New Hampshire fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.