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13,027-acre river near Maastricht. The river tops out around 97 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Here's the year, species by species, as the scoring engine sees it.
Shoreline on the chart totals 80.7 miles — 3 islands included. An index of 6.7 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The shallow band under 15 ft claims about 73% of the surface — that's where the groceries are. Call it 20.7 mi long by 9.2 mi wide at the broadest reach. Its nearest charted neighbour, Julianakanaal, is 1 mi to the northeast.
Vis- en dieptekaart van Grensmaas, Nederland: gemeten dieptelijnen (Rijkswaterstaat) tot 30 m, met visstekken voor baars, snoekbaars, snoek. De dieptelijnen zijn berekend uit gemeten bodemhoogten van Rijkswaterstaat en het officiële lokale streefpeil (NAP). Gebruik de kaart als visgids, nooit voor navigatie.
When the water first warms, european perch slide up into 3 to 12 ft. Summer is an 8 to 28 ft game here, winter a 12 to 33 ft one. Start at Measured shallow feeding flat. It's a feeding flat holding about 9 ft of water and rates prime come spring. The feeding windows run early morning. Keep a drop-shot micro plastics or a small crankbait (perch pattern) rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Measured shallow feeding flat (9 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 8 to 28 ft | dawn | Measured depth break (5 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 10 to 33 ft | midday | Measured depth break (5 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 12 to 33 ft | midday & dawn | Measured shallow feeding flat (15 ft) | Tungsten jig + maggots, Small balance jig |
When the water first warms, zander slide up into 4 to 15 ft. Summer is a 15 to 35 ft game here, winter a 20 to 40 ft one. Start at Measured depth break. It's a drop-off holding about 5 ft of water and rates prime come fall. The feeding windows run the evening and early morning. Keep a vertical softbait over humps or a deep crankbait rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Shoreline point beside measured depth (6 ft) | Softbait on jighead (10-12 cm), Shallow crankbait at dusk |
| Summer | 15 to 35 ft | dusk & dawn | Measured submerged high spot (6 ft) | Vertical softbait over humps, Deep crankbait |
| Fall | 12 to 40 ft | dusk & night | Measured depth break (5 ft) | Big softbait (12-16 cm) slow-rolled, Jigging spoon |
| Winter | 20 to 40 ft | dusk & dawn | Measured submerged high spot (6 ft) | Vertical jig / mormyshka with bait, Slow blade bait |
Spring northern pike on Grensmaas hold shallow, usually 2 to 8 ft. They move out to 8 to 20 ft in summer and finish the year down in 5 to 15 ft. Put Measured shallow feeding flat first on the milk run — a feeding flat near 3 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Measured shallow feeding flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Measured shallow feeding flat (15 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Measured depth break (5 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Measured shallow feeding flat (15 ft) | Tip-ups, Large jigging spoon |
Come spring, look for common carp tight to the bank in 2 to 10 ft. Expect a summer slide to 3 to 15 ft, then a winter hold in 10 to 30 ft. Start at Measured shallow feeding flat. It's a feeding flat holding about 9 ft of water and rates prime come spring. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday & dawn | Measured shallow feeding flat (9 ft) | |
| Summer | 3 to 15 ft | dawn & dusk | Measured shallow feeding flat (15 ft) | |
| Fall | 5 to 18 ft | midday | Measured shallow feeding flat (15 ft) | |
| Winter | 10 to 30 ft | midday | open water |
Structure-wise the chart holds 12 features, led in depth by Measured deep channel at roughly 97 ft.
Season dates, license requirements, and size and bag limits for Netherlands waters are set by the Sportvisserij Nederland (VISpas & VISplanner) — and special regulations can apply to Grensmaas specifically, so confirm the current rules before you fish.
Check the official Netherlands fishing regulations →
Grensmaas is about 97 ft (30 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Anglers target european perch, zander, northern pike, common carp on Grensmaas. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Measured shallow feeding flat is the top-rated area: a feeding flat in about 9 ft of water that rates prime for european perch in spring. The map above holds the full rated-spot list for every species and season.
For european 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 Grensmaas is regulated by the Sportvisserij Nederland (VISpas & VISplanner). Check the official Netherlands regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Julianakanaal 1 mi · Bovenmaas 14 mi · Midden Limburgse en Noord-Brabantse kanalen 27 mi · Zandmaas 32 mi · Bedijkte Maas 54 mi · Maas-Waalkanaal 55 mi · Beneden Maas 58 mi · Bovenrijn, Waal 59 mi · Bergsche Maas 60 mi · Nederrijn, Lek 64 mi · Amsterdam-Rijnkanaal Betuwepand 65 mi · Brabantse Biesbosch 67 mi
See how Grensmaas stacks up: best zander lakes in Netherlands · best northern pike lakes in Netherlands · best european perch lakes in Netherlands · best common carp lakes in Netherlands
Browse all Netherlands fishing maps or see every water on DepthScout. Bathymetry credit: Rijkswaterstaat measured bed elevations and official target water levels, CC0. 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.