Cold water out of Belwood Lake
The trout fishery on the Grand exists because of a flood-control dam. Shand Dam, which holds back Belwood Lake, was built in the early 1940s, and the Grand River Conservation Authority notes that it releases cool water from the bottom of the reservoir, which is what lets brown trout live in the river below it. In 1989 the Ministry of Natural Resources, the GRCA and Trout Unlimited Canada started stocking browns here, and the GRCA says the ministry now puts about 40,000 trout into the Grand and Conestogo tailwaters each spring. The same page is frank that browns have had limited success reproducing on their own, so this is a managed fishery kept going by those spring plantings and by strict harvest rules.
Grand River Troutfitters in Fergus describes the good water as a 26-kilometre coldwater stretch below the dam with more than 20 public access points; the GRCA counts more than a dozen marked access points, many at bridges, and puts Elora Gorge Conservation Area inside the reach. The trout water ends around West Montrose, where the GRCA's own descriptions switch to bass, pike and carp. One warning appears on almost every GRCA fishing page: levels below Shand Dam can rise quickly when releases change, so wade the gorge and the pocket water with a way out in mind.
Fergus, the Gorge and the no-kill boundaries
Ontario's 2026 regulations for Zone 16 split the tailwater into five named pieces: West Garafraxa Second Line to Scotland Street in Fergus; Tower Street in Fergus to the Bissell Dam in Nichol Township; from 100 metres below the bridge at the southern boundary of Elora Gorge Conservation Area to 100 metres above the Pilkington 8th Line; from 100 metres below the 8th Line bridge to 100 metres above the Pilkington and Woolwich township line; and from there to 100 metres above the Highway 86 bridge. In all of them only artificial lures are allowed, only one barbless hook, and the brook, brown and rainbow trout limit is zero for both sport and conservation licences. The gaps between the pieces, the water around the dams and bridges, are not part of the special reach, so check where you are standing.
Trout season follows the Zone 16 default of the fourth Saturday in April to September 30. Troutfitters' early-season advice matches what that opener usually brings: cold, high, coloured water, few bugs, and fish that respond to weighted sculpins, woolly buggers and stonefly nymphs dredged on a sink tip with a short 2X to 0X fluorocarbon tippet.
Caddis and cahills, then small flies
The shop's summary of the season is short and useful. May, June and July are the dry-fly months, with fish rising to caddis, light cahills, march browns and what Troutfitters calls a dozen other solid hatches. From July through September the river goes quiet and the game changes to small flies: midging trout and tricos, fished long and fine. By late summer the upper river can run warm and green; the shop's own conditions log once recorded 22 C and a full algae bloom in the upper section while the lower tailwater sat a few degrees cooler, which is a reason to fish the lower water and the early mornings in a heat wave.
Paris to Brantford for smallmouth
Downstream, the river stops being a trout stream and becomes one of the better smallmouth rivers in southern Ontario. The GRCA calls the stretch from Paris to Brantford the Exceptional Waters reach, recognised under a provincial program, and describes it as good for wading or for a canoe or drift boat, with access from municipal parks in downtown Paris and from Brant Conservation Area and parks in Brantford. Smallmouth share it with rainbow and brown trout, walleye, channel catfish and crappie. Troutfitters guides smallmouth on the lower Grand along with the Maitland and the Saugeen, and its crayfish and hex patterns tell you what the bass are eating.
The rules here are as strict as upstream. From 100 metres below the Highway 2 (Dundas Street West) bridge in Paris down to the angled pedestrian and service bridge just upstream of Brant Conservation Area, the 2026 summary allows only artificial lures with one barbless hook, sets brown trout, northern pike, rainbow trout, smallmouth bass and walleye at zero, and makes the reach a sanctuary from March 1 to the Friday before the fourth Saturday in April. Bass season in Zone 16 runs from the fourth Saturday in June to November 30. From Paris downstream to Lake Erie the trout and salmon season is extended to December 31, and below that Brantford bridge you may keep one trout (brown and rainbow combined) on a sport licence from October 1 to December 31. The water from the Penman Dam to the William Street Bridge in Paris is closed October 1 to November 30.
What the Galt number is telling you
The gauge on this page is the ECCC station at Galt, in Cambridge, which sits between the two fisheries and below the Conestogo and Speed confluences. It will not tell you the release out of Shand Dam, but it does tell you whether the whole river is up. No local shop publishes a wading range for Galt, so the Ideal Flow here comes from the long ECCC record: monthly means of about 38.5 cubic metres per second in May, 23.6 in June, 16.0 in August and 21.5 in October. The 460 to 1,400 cfs band (roughly 13 to 40 cms) covers that summer and fall water; well above it, as in March and April when means pass 80 cms, the lower river is a boat-only proposition. On September 24, 2026 Galt read 14.6 cms, about 515 cfs, low and clear.