Late February to March — the most dramatic wildlife spectacle on the BC coast, right in our home waters
Every year between late February and mid-March, billions of Pacific herring mass in the shallow waters of Baynes Sound and Lambert Channel to spawn. It is, without exaggeration, one of the most extraordinary wildlife events in all of British Columbia — and it happens right here, in the waters around Denman Island.
As the herring move inshore, they release enormous quantities of milt and eggs. The water turns a striking milky turquoise — a vivid, almost unnatural colour visible from the shoreline and from the air. The eggs coat kelp, rocks, and eelgrass beds in thick white layers, carpeting the nearshore environment in a dense blanket of protein. This sudden explosion of biomass triggers a feeding frenzy that draws predators from across the Pacific Northwest.
The herring spawn transforms these waters into a wildlife theatre. Thousands of seabirds descend — Pacific loons, western grebes, surf scoters, common murres, rhinoceros auklets, and gulls by the hundreds pack the surface of the water, diving and feeding in dense rafts. Bald eagles gather by the dozens in the shoreline trees, their white heads lining the branches like ornaments, swooping down to pick off herring and scavenge eggs.
Below the surface, Steller sea lions and harbour seals gorge on the herring schools. Hundreds of sea lions haul out on Norris Rocks between feeding bouts, their barking audible across the channel. And following the marine mammals come the apex predators: Bigg's (transient) killer whales, hunting the sea lions and seals that have gathered for the feast. Humpback whales also appear, lunge-feeding through the dense herring balls with mouths agape.
It's a complete food web on display — from the tiniest herring egg to the largest whale — all concentrated in a stretch of water you can cross in twenty minutes by boat.
The spawn typically occurs between late February and mid-March. The exact timing varies year to year depending on water temperature and herring migration patterns. Captain Pat monitors conditions daily and will know when it's happening.
The peak spawn event lasts roughly one to two weeks, though the wildlife activity builds beforehand and lingers after. The best single days are often mid-spawn when the turquoise water is at its most vivid and predator density peaks.
Book early. This one fills up. The herring spawn is Captain Pat's most popular tour window of the year. Repeat guests book months in advance. Contact us as early as January to secure your spot.
Pacific herring are a keystone species on the BC coast. They sit near the base of the marine food web, and their annual spawn is the single most important biological event in nearshore waters. Salmon, lingcod, rockfish, seabirds, marine mammals, and First Nations communities all depend on herring. The K'ómoks and other Coast Salish peoples have harvested herring eggs — known as "k'aaw" or spawn-on-kelp — for thousands of years, a cultural practice that continues today.
Baynes Sound and Lambert Channel are among the last remaining major herring spawning grounds on the BC coast. While herring populations crashed in many areas due to overfishing and habitat loss, the stocks in these waters have remained relatively strong — a testament to the health of this marine ecosystem and one of the reasons Captain Pat is proud to call it home.
Captain Pat has been running herring spawn tours for over 25 years. He knows where the herring concentrate, where the sea lion haul-outs are most active, and where the orcas tend to travel. A typical tour runs 3–4 hours and covers Baynes Sound, Lambert Channel, and Norris Rocks. You'll see the milky turquoise water up close, watch sea lions feeding and hauling out, count the eagles in the trees, and — on the best days — witness orcas moving through the channel.
Dress warmly. Late February on the water is cold but calm — Baynes Sound is sheltered, and conditions are usually good for boating. Bring binoculars, a camera with a zoom lens, and layers. Captain Pat provides all safety gear and local knowledge.
The herring spawn is the most dramatic wildlife event of the year on the BC coast — and it happens right in our home waters. Book early to secure your spot. Captain Pat has been guiding these tours for over 25 years and knows exactly where the action is.