O'Brien Lake

Why go

If you want a peaceful alpine lake without the circus that swirls around Banff’s headliners, O’Brien Lake delivers. Most of the approach rides the popular Taylor Lake trail, then peels off to a quieter basin tucked beneath Mount Bell. In late summer and especially fall, wildflowers and golden larches steal the show, and the shore is a fine place to lounge on drift logs and soak in the Rockies.

Route and feel

Start from the Taylor Lake parking lot off Highway 1 and follow a steady, wooded climb alongside the sounds of Taylor Creek. Views are limited in the forest, but a viewpoint near the top opens things up. From the signed junction near Taylor Lake, a brief, less-traveled spur leads to O’Brien. Many hikers tag both lakes since they’re minutes apart from the junction. Expect well-marked, non-technical singletrack with roots, rocks, and the occasional muddy patch. This is an out-and-back route, and the 10.8 miles total (17.4 km) make it a full-day outing for most.

Scenery and seasons

O’Brien Lake sits in a glacially carved basin of the Bow Range, with classic subalpine forest, meadows, and larch stands. The best window is late June through September when the trail is generally snow-free. Fall larch season is a standout—one of the area’s better color shows. Shoulder seasons can be muddy or hold lingering snow higher up, which can obscure the path.

Tips and logistics

• Trailhead: Taylor Lake parking lot, off the Trans-Canada Highway between Castle Junction and Lake Louise; the path begins at a locked gate at the back of the lot.
• Plan for a long, steady climb. The challenge is the distance and elevation, not technical terrain.
• Start early to maximize daylight and dodge typical afternoon thunderstorms. Bring layers—weather changes fast at elevation.
• This is grizzly country. Carry bear spray and make noise. Dogs must be leashed.
• A Parks Canada pass is required. Backcountry camping (e.g., at Taylor Lake) needs a separate permit.

Bottom line

Underrated and rewarding if you’re up for the distance. You’ll earn quieter shoreline time than at the big-name lakes, with bonus larch and wildflower payoffs. If you only have energy for one, O’Brien feels more tranquil than Taylor, but visiting both is easy from the junction.

Best time to hike

Late June–September for snow-free travel. Aim for fall for peak larches. Start early for cooler temps, steadier weather, and a calmer trail; expect more company on the shared approach in prime months.