Glacier National Park's Many Glacier Valley floods and evacuates — what visitors need to know
Many Glacier Valley flooded and closed. Here's what's still open, where to hike instead, and what caused the washout
Many Glacier Valley, the most scenically dense corner of Glacier National Park, flooded in early July after intense rainfall and rapid snowmelt overwhelmed Swiftcurrent Creek. The park evacuated the Many Glacier Hotel, lodge, and campground, closed the valley road, and suspended all trail access to Grinnell Glacier, Iceberg Lake, and the network of high alpine routes that draw backpackers from around the world. If you had reservations for late July or August, you need to know what's open, what's not, and where to redirect your plans.
The closure hits hardest because Many Glacier is where most visitors go for the park's best hiking. Grinnell Glacier Trail, Iceberg Lake, and the scramble to Ptarmigan Tunnel all start from this valley. Losing access means rerouting your entire itinerary, and the park's other trailheads are already absorbing the overflow.
Glacier National Park
Over a million acres split by the Continental Divide / Many Glacier closed indefinitely
The flooding isn't park-wide. Going-to-the-Sun Road remains open, Logan Pass is accessible, and the west-side valleys around Lake McDonald are operating normally. Two Medicine, the park's quietest developed area, is also unaffected and offers alpine lake hikes that rival Many Glacier without the tour buses. St. Mary Valley on the east side is open, though the Many Glacier Road turnoff is barricaded. The park estimates repairs to the valley road, campground infrastructure, and trail bridges will take weeks, possibly stretching into August depending on additional runoff.
Many Glacier concentrates everything that makes this park essential into a single valley, and now that valve is shut.
The immediate question for visitors is where to pivot. If you booked Many Glacier Hotel or the Swiftcurrent Motor Inn, the park's concessionaire is offering refunds or transfers to other lodges, but availability is scarce in peak season. Lake McDonald Lodge and the Village Inn at Apgar still have sporadic openings, though you'll be on the opposite side of the park. The east-side St. Mary campground and Rising Sun have walk-up sites, but they fill by mid-morning. Dispersed camping in the adjacent Flathead or Lewis and Clark National Forests is an option if you're willing to drive an extra hour to trailheads.
Where to hike instead of Many Glacier
If Grinnell Glacier was your target, the closest alternative is Sperry Glacier Trail on the west side. It's longer at 12 miles round trip and gains more elevation, but the glacier itself is larger and the Sperry Chalet adds a historic backcountry lodge to the experience. For the Iceberg Lake crowd, Avalanche Lake on Going-to-the-Sun Road offers a shorter, more accessible option with waterfalls cascading off surrounding cliffs. It's mobbed by noon, so start by 7 AM or wait until after 5 PM when the tour groups leave.
Two Medicine delivers the alpine lake and peak scenery Many Glacier is known for, but with a fraction of the traffic. The trail to Twin Falls and Upper Two Medicine Lake parallels the shoreline through old-growth forest before opening into a cirque surrounded by knife-edge ridges. Dawson-Pitamakan Loop is the park's premier long day hike if you want sustained elevation and big views without the Going-to-the-Sun Road crowds. It's 18 miles with over 3,000 feet of gain, so start early and bring layers for the exposed ridgeline.
What caused the flooding
The Many Glacier Valley sits at the base of multiple drainages that funnel snowmelt and rain into Swiftcurrent Creek. This year's snowpack was above average, and a series of warm days in late June accelerated melt rates just as a storm system moved through. The creek, normally a manageable flow even in peak runoff, surged beyond its banks and undercut the road embankment in multiple places. Trail bridges over feeder streams washed out, and the campground's lower loops flooded.
Climate patterns in Glacier have shifted noticeably over the past two decades. The park's glaciers have lost more than 80 percent of their mass since 1850, and the remaining ice melts faster each summer. That accelerated melt, combined with unpredictable rain events, creates flood risks that weren't as pronounced 30 years ago. The park has rebuilt this same valley road twice in the past decade after similar washouts.
Planning around the closure
If your trip is scheduled for late July or early August, assume Many Glacier will still be closed and build your itinerary around the west side and Two Medicine. Going-to-the-Sun Road is the park's centerpiece for a reason: Logan Pass sits at the Continental Divide with trailheads to Hidden Lake Overlook and Highline Trail, both of which deliver wildflower meadows and mountain goat sightings without the mileage commitment of Many Glacier's routes. The Highline Trail in particular stretches 11.8 miles to the Loop with minimal elevation change, hugging the cliffs above the valley and offering sustained views that compete with anything in the park.
If you're flexible, consider shifting your trip to September. Crowds thin after Labor Day, the fall colors peak in the valleys, and Many Glacier may reopen by then depending on repair progress. September weather is colder and more variable, but the park's infrastructure is less strained and permits are easier to secure.
What the park is doing
Glacier's maintenance crews are assessing road damage and prioritizing repairs based on visitor access and safety. The Many Glacier Road requires culvert replacements and embankment reconstruction in at least three locations, and trail crews are rebuilding footbridges over side drainages. The park hasn't committed to a reopening date, and the timeline depends on weather, contractor availability, and additional runoff events. If another storm hits before repairs are complete, the closure could extend into September.
The park is redirecting its ranger-led programs to the west side and St. Mary Valley, and adding extra staff at Logan Pass and Avalanche Lake to manage the increased traffic. Visitor centers at Apgar and St. Mary are fielding questions about alternatives, and the park's social media accounts are posting daily updates on road and trail conditions.
What this means for future summers
Flooding in Glacier isn't new, but the frequency and intensity of these events are increasing. The park's infrastructure was built for a climate that no longer exists, and the cost of maintaining roads and trails in a landscape shaped by accelerated glacial melt and heavier precipitation is rising. Many Glacier Valley will reopen, but expect similar closures in other parts of the park as runoff patterns shift.
For visitors, this means building flexibility into your plans and having backup options for every major hike. The park you imagined from brochures and Instagram posts is still here, but access to its most iconic spots is less predictable than it was a generation ago. Check conditions the day before you arrive, not weeks in advance, and be ready to pivot.