A 200 foot falls in a birch canyon at the edge of Chugach State Park, an easy mile from the Glenn Highway and famous for its winter ice sculptures.
Mid May through July
Big water window
in a typical year
Snowmelt
What drives it
Thunder Bird Creek
Climatology
Data on this page
Thunder Bird Creek is ungauged
Alaska State Parks
Managed by
their rules govern
Trail status, closures and safety rules belong to each falls' managing agency, named and linked on every page.
The season
What fills Thunderbird Falls, and when
Thunder Bird Creek carries Chugach snowmelt, so the falls runs hardest from breakup through July and settles in fall. The park's own trail guide highlights the other end of the cycle: the falls often freeze in winter, producing ice sculptures. Two shows a year, both documented by the agency.
Typical best flow: Mid May through July
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What the agency itself says
After a brief uphill section, the trail skirts the edge of a canyon and private property to take you to a recently refurbished viewing deck. From the deck you can see the picturesque Thunder Bird Falls. For more adventure follow the trail down to the base of the falls for a close up look.
Chugach State Park (Alaska Department of Natural Resources)What a snowmelt year looks like at full send: Palouse Falls in mid April, when the Palouse River is still carrying the melt. The same falls in late August is a ribbon. Timing is most of the visit. “04-15-14-palouse” — Dsdugan — CC0
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Right now
Current flow at Thunderbird Falls
The other half of the story: the same Palouse Falls in late August. Nothing is wrong; this is what a snowmelt river does every year once the melt is spent. “Palouse Falls 20100829” by Mark Wagner, CC BY-SA 2.5
Getting there
Access, in the agency's words and ours
The state park guide describes a one mile, 175 foot gain walk to a refurbished viewing deck, with a steeper spur down to the base. Parking at the trailhead off Glenn Highway mile 25 carries the standard Chugach State Park day use fee.
A forest canyon falls between seasons (Blackwater Falls, West Virginia). Thunderbird Falls swings harder: full melt-season voice in June, frozen sculpture by January, per its own park guide. “Blackwater Falls (15437499241)” by Benjamin Smith from United States, CC BY 2.0
Common questions
Thunderbird Falls flow season FAQ
The reliable big-water window is Mid May through July. Thunder Bird Creek carries Chugach snowmelt, so the falls runs hardest from breakup through July and settles in fall. The park's own trail guide highlights the other end of the cycle: the falls often freeze in winter, producing ice sculptures. Two shows a year, both documented by the agency.
Thunder Bird Creek has no USGS gauge near the falls, so the seasonal pattern above is the flow guide for Thunderbird Falls, and Chugach State Park (Alaska Department of Natural Resources) is the source for current conditions on the ground.
No; it swaps states instead. Summer gives moving water, winter gives the frozen columns the park guide advertises. Shoulder seasons carry ice underfoot on the deck spur, per the guide's cautions about cliffs.
Chugach State Park (Alaska Department of Natural Resources). The state park guide describes a one mile, 175 foot gain walk to a refurbished viewing deck, with a steeper spur down to the base. Parking at the trailhead off Glenn Highway mile 25 carries the standard Chugach State Park day use fee. Trail status, closures and safety rules are theirs, and their page is linked on this one; nothing here overrides what they publish.
In their own words: "Keep an eye on children when near cliffs and down near the falls. Subdivision near trail; please respect private property." That sentence is Chugach State Park (Alaska Department of Natural Resources)'s, quoted verbatim, and their page is the place to check before you go.
Yosemite Falls in May, running on snowmelt that will be gone by late summer. The National Park Service tells visitors the falls can be dry by August, which is why every falls page here starts from its watershed. “Tourists below Yosemite Falls (39832011431)” by Mike McBey, CC BY 2.0
The 377 foot cascade beside the Mendenhall Glacier, reached by a flat lakeside trail from the visitor center and thundering hardest in the glacier-melt months.
Flow windows are typical-year climatology drawn from the driver and the agency language quoted above, not forecasts. Live readings and per-date percentiles are U.S. Geological Survey data, public domain; the above-or-below-typical line is our comparison and is labelled as such. Access, trail and safety information belongs to Chugach State Park (Alaska Department of Natural Resources). National picture: waterfall season across the US → Hero image: “Blackwater Falls (15437499241)” by Benjamin Smith from United States, CC BY 2.0
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