Lock 1 (Blanchetown)

Two rules shape a Lock 1 trip before any tackle does. There is no fishing within 150 metres of any lock or weir on the River Murray, permanently, so the chamber, the weir and the water immediately around them are closed. The Lock 1 lawn area is where you park rather than where you cast, and the fishing bank sits well outside that radius, downstream of the signed lock boundary. Murray cod, meanwhile, cannot be targeted at all from 1 August to 31 December, trolling included, on a penalty of up to $20,000, and catch and release is the only option even in the open 1 January to 31 July window. What is left is the callop bank the reports keep naming, with an Adelaide tackle shop naming Blanchetown in both its July and its September 2026 reports, September rated as the month for the biggest fish of the year and 60 cm a live possibility. Carp are the certainty, and the local wisdom is that they can always be had from the bank below the lock boundary and that they are often big and hard-fighting. The setting is Lock and Weir No. 1 itself, opened to river traffic on 5 April 1922, named for the pioneer riverboat captain William R. Randell and carrying the longest weir on the Murray at 168.85 metres. About 145 km north of Adelaide, it is the lock you can drive to, fish and be home from in a day.

The play is the broken, aerated water downstream of the weir, fished from the bank outside the 150-metre exclusion. Set a bait and wait, or work the drop-off with lures, using the old fisheries-officer method of bouncing a sinker along the bed until you have to feed out one to three metres of line to find the ledge. The documented method on this reach through 2026 is scrubworms soaked on the bottom, or lipless vibes and blades jigged along the drop-offs and around snags, and Blanchetown was named in both the July and the September tackle-shop reports. Live shrimp trapped on the spot is the traditional local bait, earthworms are the fallback, and small yabbies suit callop. For carp, bread dough, cheese and corn all work, and meat baits are out entirely, because blood, bone, meat, offal and animal skin are prohibited as bait or berley anywhere in South Australian waters. Whatever you throw, do not troll a lure for cod, because the closure explicitly covers trailing a baited line or lure from a moving boat and it runs to 31 December.

Callop are the reason to come: 33 cm minimum, bag 5, boat limit 15, no closed season, and September is the documented month for the biggest of them, with 60 cm possible on this reach. Carp are the reliable bank fish below the lock and often substantial, they are declared noxious so they must be killed humanely and disposed of away from the water rather than released, and a 5 kg one on 6 kg line puts up a better fight than its reputation allows. Redfin turn up through this part of the river and are noxious as well, so they cannot go back in the water either. Murray cod live in this reach but may never be kept anywhere in the River Murray proper, which means no legal size, no slot and no bag, with catch and release confined to 1 January to 31 July and targeting banned outright for the rest of the year. Silver perch, freshwater catfish and Murray crayfish are fully protected and are returned immediately. Yabbies have no size limit, a bag of 200 and a boat limit of 600, and berried females are totally protected.

Read the signs at the precinct and give the lock a wide berth, because 150 metres is further than it looks from a lawn and the fishing water is downstream of the boundary anyway. September is the month to book, with the biggest callop of the year on and the river running higher than it has since the 2022-23 flood. Trap shrimp on the spot for bait, since it beats anything on a shop shelf. Bring a bag for the carp and the redfin, because neither goes back in the water and neither belongs on the grass. The two caravan parks beside the lock make this an overnighter rather than a dash, and one of them has two pontoons reaching out over the water, which is the easiest fishing platform in town. Yabby gear is a common trap, because opera-house nets and yabby pots are illegal in South Australia, as are drum nets and set lines. And if the cod itch needs scratching between August and December, the reservoirs are where catch and release stays legal, permit in hand.

The Lock 1 precinct runs off The Parade and Egerton Street at Blanchetown, about 145 km north of Adelaide up the Sturt Highway, with a public lawn area on the lock and sealed parking. The lock operates 8:00 to 11:30 and 13:00 to 16:30, which is worth knowing because those are the hours the houseboats queue. A boat ramp sits about 350 metres upstream of the lock off the northern end of The Parade, and the town is well rated for its launching facilities. This page is pinned on that ramp rather than on the lock lawn, because the lawn sits inside the 150-metre exclusion and the ramp does not — the fishing bank this page describes is the other way, so walk down past the lock to reach the water below the weir. Toilets are the weak point, since the Blanchetown Roadhouse has public facilities and there are toilets in town, but no toilet block on the lock precinct itself is confirmed, so plan accordingly. Two caravan parks sit on the river here, the one beside Lock 1 with a wide lawned riverfront, grassed sites running to the bank and two pontoons out over the water, and the other in bushland surrounded by wetlands. Town services run to a hotel, a roadhouse with fuel, a police station and a school. The precinct is flat mown lawn beside sealed parking, but no accessibility statement exists for it, so do not assume a graded path to the water.

No tide reaches this far. Lock 1 is the boundary between the lower river and the lock pools upstream, so the water answers to flow rather than the moon, and the solunar bite windows still apply while tide readings do not. Flow is up and that is the headline. About 22.5 GL a day was entering South Australia at the border on 18 August 2026, the highest since the 2022-23 flood, against 8 GL a day in August 2025 and 4 GL a day in August 2024. That rise lifted the river 15 to 20 cm, reopened creeks and boosted yabby numbers, and a further rise was expected in early September 2026. Flow over the weir is precisely what makes the water below the lock fish, so a river with something in it is a good sign rather than a problem. September is the documented peak for the big callop on this reach. Falling water after a summer high is the yabby window. The lower river runs coloured, so bait and high-vibration lures earn their keep, and a stiff wind on this open reach is uncomfortable rather than fatal to the fishing.

The lock and weir are the first hazard and the first rule, with no fishing within 150 metres of either, permanently, and signed SA Water boundaries on the ground to obey. Water below a 168.85-metre weir with a navigable pass and a sluice section is aerated, fast and deceptive, and it is not a swimming spot for children no matter how inviting the caravan-park pontoons look. The lock works to a timetable of 8:00 to 11:30 and 13:00 to 16:30, and houseboats and cruisers queue and manoeuvre in the approach during those windows. River level moves, since the 2022-23 flood was the largest since 1956 and peaked at 186 GL a day at the border on 22 December 2022, and the August 2026 flows were the highest since, so banks can be undercut and slippery. Blue-green algae is a standing lower-Murray risk, with a 2024 bloom putting warnings on parts of the Murray and Lake Alexandrina from 22 March and the alert running to 2 July, so check current advice before a dog or a child goes near the water. Downstream of the precinct the bank is unmown snake country, there are no lifeguards, and the water is cold enough in winter to matter.

Yes, but not at the lock itself. Fishing is prohibited within 150 metres of any lock or weir on the River Murray, permanently, so the chamber and the weir are closed water and there are signed SA Water boundaries on the ground. The fishing is the bank downstream of that boundary, which locals rate for callop and for big carp. Park at the Lock 1 lawn area and walk downstream, well clear of the signed boundary, before you cast.

No. Targeting Murray cod is prohibited across the South Australian River Murray from 1 August to 31 December, including trolling a lure from a moving boat, with penalties up to $20,000. Catch and release is permitted only from 1 January to 31 July, and taking a Murray cod is prohibited at all times in the River Murray proper, so there is no legal size or bag. Catch and release stays legal year-round in the reservoirs, which need an SA Water permit.

The cold months, with September the standout. An Adelaide tackle shop named Blanchetown in both its July and its September 2026 reports and rated early spring as the time the largest callop are chewing, with fish to 60 cm possible. Callop have no closed season, a 33 cm minimum and a bag of 5, so the calendar is a matter of odds rather than rules.

No. South Australia has no general recreational fishing licence in fresh water or salt, and that covers the whole River Murray. Reservoir fishing is the exception and needs an SA Water permit. Size limits, bag limits, the Murray cod closure and the 150-metre lock exclusion all apply regardless.

Callop and carp, mostly. The long-standing local advice is that carp can always be had from the bank immediately below the lock boundary and that they are often big and hard-fighting, while the same stretch produces good callop, especially in the cold months. Redfin turn up through this part of the river too. Carp and redfin are both declared noxious and must not be returned to the water.