Hiking in Petgill Lake: trails, map and practical info

Description

Petgill Lake sits tucked into the Vancouver Coast Mountains near Squamish, with the trailhead positioned close to Murrin Provincial Park along the Sea-to-Sky Highway. It's a legitimate mountain destination — 19 kilometers round trip, 650 meters of elevation gain, and a solid 6.5 hours on your feet. This is not a casual stroll, but the payoff at the top earns every step of the climb.

The Trail Experience

From the trailhead, the path pulls you straight into dense coastal forest. Towering Douglas fir and western hemlock close in overhead, with ferns and moss blanketing the ground on either side. The lower section eases you into the day — the grade is manageable and the forest cover keeps things cool, which you'll appreciate on warmer mornings.

As you gain elevation, the trail starts to open up. Rocky outcrops push through the trees and offer the first real views down toward Howe Sound. These natural rest spots are worth pausing at — not just to catch your breath, but because the sight lines across the sound and toward the surrounding peaks genuinely reward the effort you've already put in.

The middle section is where the trail earns its Hard rating. The grade steepens, the terrain gets uneven, and you'll be picking your way over rocky stretches and the occasional boulder that requires a bit of scrambling. The forest composition shifts here too — the massive coastal trees thin out and give way to smaller alpine species as you push higher. It's a noticeable transition that signals you're getting close to the lake's elevation.

Throughout the climb, intermittent views toward Howe Sound keep you oriented and motivated. On clear days, you can pick out the islands scattered across the sound's waters. The views grow progressively wider the higher you go, which makes the sustained effort feel like it's building toward something rather than just grinding uphill.

Petgill Lake

The lake sits in a natural bowl, ringed by steep mountainsides and dense forest. After the climb, stepping out to find calm water is a genuine moment — the contrast between the rugged terrain you've just navigated and the stillness of the lake surface is striking. When conditions cooperate, the water mirrors the surrounding peaks and sky cleanly.

The shoreline has several good spots to drop your pack and eat lunch. The water stays cold through most of the hiking season, though on hot days some hikers wade in for a quick cool-down. The setting has a distinctly alpine character — the treeline is close, the peaks press in from above, and the sense of being deep in the mountains is real despite the relatively accessible trailhead.

What to Bring and How to Prepare

The combination of distance, elevation gain, and rocky terrain means your footwear matters. Sturdy hiking boots with solid ankle support and good traction are the right call here, especially since the rocky sections get genuinely slippery when wet. Wet conditions are common in this coastal mountain environment, so plan accordingly regardless of the forecast.

Carry more water than you think you'll need. There are no reliable water sources on the trail until you reach the lake, and the length and elevation gain add up to significant exertion. If you plan to use lake water, bring a filter or purification tablets — don't count on drinking it untreated.

Layering is essential. Temperatures at the lake can be considerably cooler than at the trailhead, and weather in the Coast Mountains moves in fast. Even a warm morning at the trailhead doesn't guarantee comfortable conditions at elevation, so pack a mid-layer and a rain shell regardless of how the day starts.

An early start is worth it for a few reasons. Parking near the trailhead fills up during peak season, afternoon weather in the Coast Mountains tends to deteriorate, and morning light on Howe Sound is hard to beat. Getting on trail by 7 or 8 a.m. puts you in a much better position on all fronts.

On the Trail

Black bears are present in this area. Make noise while hiking, especially through sections with limited visibility, and store food properly. Keep your pack organized so you're not fumbling with snacks in bear country.

The alpine environment around the lake is fragile. Stick to established paths, avoid trampling vegetation near the shoreline, and pack out everything you bring in — including fruit peels and cores. The area recovers slowly from impact, and keeping it in good shape matters for everyone who comes after you.

The trail's proximity to Vancouver means it draws a crowd during peak season, but the distance and elevation gain do a reasonable job of filtering out anyone who isn't committed to a full mountain day. You're likely to share the trail with people who are there for the same reasons you are.