Opabin Plateau Circuit

Why hike it

If you came to Lake O’Hara for the greatest hits, this is the loop. The Opabin Plateau Circuit strings together a hanging valley of turquoise lakes, flowered meadows, and the cliff-edge Opabin Prospect—one of the most photogenic views in the Rockies. It’s a moderate loop with about 250 m of gain and 5.9 km total (3.7 miles), with common side spurs that can push it closer to 7.6 km.

The experience

From the south shore of Lake O’Hara, climb onto the Opabin Plateau via either West Opabin (steeper, punchier, immediate drama) or East Opabin (gentler, steadier). Once on top, the terrain rolls across classic alpine scenery: larch stands, rocky ribs, and a string of lakes—Mary Lake, the Moore Lakes, Hungabee Lake, and the crown jewel, Opabin Lake tucked beneath rugged peaks. The circuit is well signed and maintained, with occasional talus, short bridges, and sections that can be muddy or hold snow early/late season.

Don’t miss Opabin Prospect, a cliff-edge perch looking straight down to Lake O’Hara—plan extra time for photos. At the far end of Opabin Lake a small glacier is visible; stay off it—crevasses make it dangerous.

Difficulty and pacing

Expect a steady climb to the plateau and some steeper pitches (especially via West Opabin), but nothing technical. Most hikers take 2–3 hours for the 5.9 km loop; add time if you linger at viewpoints or explore spurs.

Nature highlights

You’re walking a classic glacially carved hanging valley: meadows ringed by rock and water, with a remnant glacier visible at Opabin Lake. Summer brings wildflowers; late September lights up the dense larch forests in gold—arguably the best time to hike this loop if you can snag access.

Best time to hike

Late June through September is the reliable window. Wildflowers peak in summer; larches glow in late September. Weather turns quickly at this elevation—carry layers and rain gear. For photography, budget time for Opabin Prospect and Opabin Lake; both reward unhurried stops.

Tips

• Choose your direction: ascend East Opabin for a smoother climb, descend West for big views—or flip it if you prefer getting the steep done early.
• Bears (including grizzlies) frequent the area—make noise and carry bear spray.
• Considering bigger objectives? Strong hikers sometimes link from the Lake O’Hara Alpine Circuit down scree to the plateau—rugged, with potential snow; only if you know what you’re doing.

Access and regulations

Access to Lake O’Hara (and this loop) is strictly managed—an advance shuttle reservation is required. No separate trail permit. Pets are not permitted on the Lake O’Hara trail network. The route is not wheelchair accessible.