Sulphur Skyline

Rae here. The Skyline is the kind of half-day push that punches well above its 8 km. You earn 700 m of gain on a trail that doesn't waste any of it on flat ground, and the payoff is a 360 over the Fiddle Range that feels a lot bigger than the effort suggests on paper.

The trail

You start from the upper Miette Hot Springs lot, which is convenient and also means you're sharing the first stretch with people in flip-flops who turn around at the first switchback. The path climbs steadily through subalpine spruce and fir, paved-then-gravel, until it splits at the Shovel Pass / Mystery Lake junction. Stay right and uphill for the Skyline.

From there it gets serious. The grade kicks up, the trees thin, and the last kilometre and change is exposed scree and rubble on a narrowing ridge. It's not technical — no hands needed in dry conditions — but it's loose, and the summit cone is steep enough that descending it in trail runners with worn lugs is a bad time. Up top you're looking down into the Fiddle valley, across at Ashlar Ridge's tilted limestone, and back toward the Athabasca on a clear day.

Out-and-back means you retrace the entire 4 km descent. Knees know.

When to go

The realistic window is late June through September. Snow lingers on the upper ridge into early summer and the scree gets sketchy when wet or icy. July and August are the busiest — combine the hike with a hot springs soak and you've got most of Jasper's day-trippers on the same trailhead. Early September is the sweet spot: thinner crowds, stable weather, larch starting to turn at elevation. Shoulder-season hikers should check Parks Canada conditions; the 2024 Jasper wildfire reshaped a lot of this corner of the park, and trail status, facilities, and access to Miette have all been moving targets.

Afternoon thunderstorms are the real seasonal hazard. The summit ridge is the highest thing around and offers exactly zero shelter. Start early and be off the top by early afternoon if there's any convective forecast.

What to know before you go

• Permits: A Parks Canada day pass is required for entry to Jasper National Park. No separate permit for the hike itself.
• Parking: The Miette Hot Springs lot fills by mid-morning in summer. Get there before 9 if you want a spot near the trailhead, or be ready to walk in from the overflow.
• Water: There is no reliable water on the trail. Carry everything you'll drink — at least 2 L in warm weather. The trailhead has potable water at the hot springs facility (when open).
• Wildlife: This is bear country, both black and grizzly. Carry spray and know how to use it. Hike in a group, make noise on the wooded lower switchbacks where sightlines are short.
• Navigation: The trail is well-defined and signed at the Shovel Pass junction. The only real route-finding is the upper scree, where braided boot paths can confuse the descent. Don't shortcut the switchbacks — the slopes are erosion-prone and rangers will (rightly) chew you out.

What to bring

Treat this as a small alpine objective rather than a casual day hike. Sturdy boots or trail shoes with real lugs, trekking poles for the descent, a wind layer for the ridge (it's almost always blowing up there), sun protection because the upper half has zero shade, and bear spray accessible — not buried in your pack. Pack snacks and at least 2 L of water per person. A light puffy lives in my pack year-round up here; summit temps can be 15°C below trailhead readings.

Variations

• Shorter: Turn around at the Shovel Pass junction for a forested 4-ish km out-and-back with most of the climbing done. Decent leg-stretcher, no views.
• Soak finish: Build the hot springs into the day — the parking situation actually works in your favour if you start at dawn and soak after descending.
• Bigger day: From the Shovel Pass junction you can continue deep into the Fiddle backcountry toward Mystery Lake and beyond. That's a different trip entirely — overnight gear, river crossings, much more remote — but it starts from the same trailhead.