Highline Trail vs The Narrows: which trail should you hike?
Both trails clock in at exactly 10.6 miles and both live in Glacier National Park, but that's where the similarities end. Grinnell Glacier delivers the park'...
Both trails clock in at exactly 10.6 miles and both live in Glacier National Park, but that's where the similarities end. Grinnell Glacier delivers the park's greatest hits: turquoise lakes, cascading waterfalls, a living glacier, and enough visual variety to keep a photography obsessed hiker happy for days. Mount Jackson asks a different question entirely: how much suffering can you endure for a view that maybe three dozen people will see all season?
Grinnell Glacier is Glacier's flagship day hike, the trail that appears in every trip planning guide and fills the Many Glacier parking lot before sunrise. Mount Jackson is the trail for people who want to earn their solitude through elevation gain that feels like climbing a skyscraper with a backpack. One gives you iconic scenery with manageable effort. The other gives you a summit and the knowledge that you worked harder than nearly everyone else in the park that day.
The choice isn't about which trail is better. It's about whether you want Glacier's beauty served accessibly or whether you want to claw your way to a view that most visitors will never see.
The Approach
Grinnell Glacier starts with instant gratification. You'll follow the shoreline of Swiftcurrent Lake and Lake Josephine for the first two miles, walking through scenery so postcard-ready it feels almost unfair. The trail stays flat, the views stretch across the valley to the mountains beyond, and you'll pass through stands of subalpine fir that smell like Montana in concentrate form. It's the kind of start that makes you forget you're supposed to be working.
One trail seduces you with easy beauty before the real climbing begins; the other announces its intentions immediately.
Mount Jackson doesn't bother with pleasantries. You'll start from the Gunsight Pass trailhead and follow the valley floor through wildflower meadows, but within the first mile the trail tilts upward and doesn't relent for the next seven miles. The meadows are lovely, but they're a brief prologue to what becomes a grinding ascent through switchbacks that feel like they were designed by someone who thought "gradual" was a character flaw.
The Climb
Grinnell Glacier saves most of its elevation gain for the second half. After those flat lakeside miles, the trail climbs about 1,600 feet over the next three miles. The grade is steady but never punishing, and the scenery changes with enough frequency that you're distracted from the work. You'll pass Grinnell Lake far below, walk beneath waterfalls that spray the trail with mist, and cross sections of rock where the exposure feels thrilling but never dangerous. The climbing here is the kind you can do while still holding a conversation.
One trail asks for endurance in manageable doses; the other asks how much pain you're willing to trade for bragging rights.
Mount Jackson's 4,000 feet of elevation gain is relentless. The trail climbs through subalpine forest where the switchbacks blur together, then breaks into alpine meadows where the terrain opens up but the grade doesn't ease. The upper section requires scrambling over loose rock and navigating sections where the route isn't always obvious. You'll climb the equivalent of a 400-story building, and by the time you reach the ridgeline, your legs will remind you of every single floor.
The Payoff
Grinnell Glacier ends at the turquoise lake formed by glacial melt, with the remnants of the glacier clinging to the mountainside above. The color of the water is almost absurd, a shade of blue-green that doesn't look real until you're standing in front of it. Icebergs float in the lake even in August. The cirque walls rise on three sides, and if you're lucky, you'll watch chunks of ice calve from the glacier and crash into the water below. It's the kind of destination that delivers exactly what the brochure promised, which is rare enough to feel like a gift.
One trail gives you a scene; the other gives you a summit and the entire park spread out like a topographic map come to life.
Mount Jackson's summit sits at 10,052 feet, and the view from the top is the kind that makes you understand why people climb mountains. You'll see the entire spine of the Continental Divide stretching north and south, lakes scattered across the valleys below like someone spilled a bag of sapphires, and on clear days, peaks that stretch into Canada. The summit is small, the wind is constant, and you'll likely have it to yourself. This is the view you earn when you're willing to suffer for it.
The Crowds
Grinnell Glacier is one of the most popular trails in a park that already feels crowded by July. The Many Glacier parking lot fills before 7 a.m. on summer weekends, and you'll share the trail with enough people that passing slower hikers becomes part of the experience. The good news is that the trail is wide enough to absorb the traffic, and the scenery is distracting enough that the crowds feel less intrusive than they might elsewhere. You won't have solitude, but you also won't feel like you're in a conga line to the glacier.
One trail is a shared experience where you nod at dozens of hikers; the other is a lonely grind where you might not see another soul past the first mile.
Mount Jackson is the opposite. The trailhead sees a fraction of the traffic that Many Glacier does, and most hikers headed this direction are aiming for Gunsight Lake or Gunsight Pass, not the summit. Once you leave the main trail and start the scramble toward the peak, you're likely alone. You'll hike for hours without seeing another person, which is either liberating or unnerving depending on your comfort level with solitude in grizzly country.
Which One Should You Choose?
Choose Grinnell Glacier if you want the iconic Glacier experience without committing to a sufferfest. This is the trail for photographers, for hikers who want stunning scenery without technical scrambling, and for anyone who believes that beauty shouldn't require bleeding quads. You'll share the trail, but the destination is worth the company. This is the hike that converts people into Glacier devotees.
Choose Mount Jackson if you want a summit, if you're comfortable with route-finding on loose terrain, and if solitude matters more than accessibility. This is the trail for experienced hikers who measure a good day by elevation gain and vertical feet climbed. You'll work harder, see fewer people, and earn a view that most park visitors will never witness. The suffering is the point.
Both trails are 10.6 miles, but one feels like a scenic tour through Glacier's greatest hits while the other feels like a personal grudge match with gravity. Pick based on whether you want your memories to come with a side of social media validation or a side of knowing you outworked almost everyone else in the park that day.