Getting stung once by a wasp ruins an afternoon. Getting stung more than 100 times while dangling on a vertical rock wall turns into a terrifying medical emergency.
That is precisely what happened to a female rock climber on the Redoubt Wall near Loggers Creek, roughly 40 kilometres north of Vancouver along British Columbia's famous Sea to Sky Highway. Stung over a hundred times by aggressive ground-nesting yellowjackets, she faced a grim reality. She could neither fight off the swarm nor safely hike her way out of the backcountry.
It took a coordinated multi-agency rescue effort involving Lions Bay Search and Rescue (LBSAR) and North Shore Rescue to get her off the mountain alive. If you think bugs are just a minor annoyance while enjoying the outdoors, this incident proves otherwise.
The Brutal Reality of Backcountry Wasp Attacks
Yellowjackets do not care about your climbing grade. They build hidden nests under roots, rocks, rotting logs, and dirt patches right beside hiking paths and approach trails. When a climber accidentally brushes against a nest or vibrates the rock face near a colony, the reaction is instantaneous.
Unlike honeybees, wasps can sting repeatedly. They do not lose their stingers. When a climber disturbs a large nest on a vertical cliff ledge, hundreds of insects can swarm simultaneously.
Receiving over 100 stings introduces a massive load of venom into the human body. Beyond the intense, burning pain, rescuers worry immediately about a serious systemic reaction. Even people who have never experienced an allergy can suffer dangerous physiological shocks when hit with that much toxin at once.
How the Rescue Operation Unfolded
When Lions Bay Search and Rescue received the call, they knew speed was everything. They deployed a ground team carrying emergency medical supplies, including epinephrine, racing uphill toward Loggers Creek.
Quickly assessing the geography, team leaders realized the injured climber could not make the physical descent on her own. LBSAR requested immediate mutual aid from North Shore Rescue for a technical helicopter extraction.
Two advanced medical providers and a technical rescue specialist flew directly to the site. Because the climber was trapped beneath a dense, heavy tree canopy on the rugged mountainside, the crew had to be inserted manually by the helicopter. Rescuers stabilized her on-site before hoisting her up through the trees into the aircraft. She was flown directly to BC Emergency Health Services for urgent medical care.
Why Wasp Populations Are Worse Now
Search and rescue groups across Western Canada have issued repeated warnings that wasp activity has spiked dramatically. Milder winters allow more queen yellowjackets to survive the cold months. An early spring gives those queens a head start on building colonies, while longer growing seasons let nests swell to massive proportions before autumn arrives.
Climbers and hikers are running into defensive colonies in places they wouldn't normally expect them, including treed ledges midway up popular climbing routes. What used to be a clean multi-pitch climb can turn into a gauntlet of stinging insects.
What You Should Do to Stay Safe
You cannot completely eliminate the risk of running into ground wasps, but you can change how you react when things go sideways.
- Watch the ground and ledges: If you notice increased insect activity around a rock crack or dirt patch during your approach, back away slowly.
- Carry antihistamines and safety gear: While severe reactions require epinephrine, having oral antihistamines in your pack can help manage milder localized allergic responses.
- Do not stick around to swat: If you trigger a nest, running or moving away rapidly is your only real defense. Fighting back against a swarm only agitates them further.
- Report active nests: Local search and rescue teams rely on community reports to warn other outdoor recreationists about dangerous zones.
Check trail reports before you head out, keep a wide berth around suspicious ground cavities, and respect the local wildlife—even the kind that wants to ruin your day.
