Larch Valley / Minnestimma Lakes Trail

The Larch Valley / Minnestimma Lakes Trail is a 9 km out-and-back from the Moraine Lake visitor access to the alpine lakes, about 4.5 km each way. Allow 3.5 to 4 hours and roughly 570 m of climbing. It is listed as moderate, but the uphill work comes early in a long set of switchbacks. The reward is a quieter-feeling alpine basin among larches, with the Ten Peaks behind you. This route ends at Minnestimma Lakes; Sentinel Pass is a separate, steeper continuation.

Moraine Lake Road is closed to personal vehicles year-round. Reach the lake by shuttle, public transit or a licensed tour, and reserve ahead. From the visitor arrival area, follow the path past the canoe docks to the signed Larch Valley route. The visitor distance above includes that approach, then the trail itself.

The first stretch climbs steadily through switchbacks and offers little view, so the climb can feel longer than the map suggests. At the Eiffel Lake junction, stay on the Larch Valley branch; the other trail heads toward Eiffel Lake and Peak. There is a bench at the junction. Beyond it, the grade eases and the route passes through open larch forest and meadow before becoming rockier near the lakes.

Alpine larches are conifers that drop their needles each fall. As the weather cools, the needles turn gold for a short window, often beginning around mid-September and lasting only a few weeks. The exact timing shifts from year to year. The stand opens into a broad meadow, then thins higher up, where the trees grow low and sparse. The striking view is behind you on the way in: turn around to see the larches with the Ten Peaks across the valley.

The trail reaches a boulder-strewn alpine basin below Sentinel Pass. A small tarn just before the lakes gives you a Mount Fay backdrop; at the larger lake, look across the rock piles for movement and listen for pikas. They are a possibility, not a sure sighting. Take a break here and turn back unless you are deliberately adding the Sentinel Pass route; the steep climb beyond the lakes is not included in this hike's distance.

Moraine Lake is framed by Lower Cambrian quartzite and hardened shale. Despite its name, a landslide dammed the lake; glacial moraine ridges sit beyond its far end. That is a nice detail to have in mind while you leave the lakeshore and climb into the valley.