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Yaak River
Yaak River at Yaak, Montana.jpg
Yaak River at Yaak, Montana
Other name(s) Yahk River
Country United States, Canada
State Montana
Province British Columbia
Physical characteristics
Main source Purcell Mountains
Yahk Mountain
4,910 ft (1,500 m)
49°12′35″N 115°42′41″W / 49.20972°N 115.71139°W / 49.20972; -115.71139
River mouth Kootenay River
Troy, Montana
1,838 ft (560 m)
48°33′40″N 115°58′37″W / 48.56111°N 115.97694°W / 48.56111; -115.97694
Basin features
Basin size 766 sq mi (1,980 km2)
Tributaries
  • Left:
    East Fork Yaak River, South Fork Yaak River
  • Right:
    West Fork Yaak River

The Yaak River is a cool river that flows through two countries! It starts in Canada and then crosses into the United States. In Canada, people often spell its name as Yahk River.

This river is a tributary of the Kootenay River. A tributary is like a smaller river or stream that flows into a larger river. The Kootenay River is also spelled Kootenai in the United States.

Where Does the Yaak River Flow?

Upper Yaak Falls on the Yaak River
Yaak River at Upper Yaak Falls
Lower Yaak Falls on the Yaak River
Yaak River at Lower Yaak Falls

The Yaak River begins high up in the Purcell Mountains. This is near a place called Yahk Mountain in southeastern British Columbia, Canada. From there, the river flows south.

It then crosses the border into Montana, United States. As it travels, other smaller rivers join it. First, the East Fork Yaak River adds its water. Then, the West Fork Yaak River joins in. The West Fork actually starts in Montana, goes into British Columbia, and then comes back to Montana to meet the main Yaak River!

After these forks join, the South Fork Yaak River also flows into the Yaak River. The river then makes a big curve, heading west and then south. Many smaller streams, like Spread Creek and Hellroaring Creek, also add to its flow. Finally, the Yaak River empties into the Kootenai River near the small city of Troy, Montana.

Much of the Yaak River and its smaller streams in Montana are found within the Kootenai National Forest. This is a large area of protected land.

River Adventures: Whitewater Rafting

The Yaak River is known for its exciting whitewater sections. These parts of the river have fast-moving water and rapids. Some sections are quite challenging, perfect for experienced rafters or kayakers.

The river has different levels of difficulty for boating. From Yaak Falls down to where it meets the Kootenai River, it's considered Class III to Class V. This means it can be a thrilling ride for those who enjoy whitewater sports!

What Does "Yahk" Mean?

The name "Yahk" has an interesting history. It comes from the Kutenai language, which is spoken by the Kootenay people. In their language, "Yahk" can mean either "arrow" or "bow."

Some people think the name refers to the Yaak River itself. Others believe it might refer to the Kootenay River. The Kootenay River makes a big curve, like a "bow," as it flows from Canada into the United States and back into Canada. If that's the case, the Yaak River might be seen as the "arrow" that fits with the "bow."

The United States Geological Survey (USGS) notes that the Yaak River has been called by a few different names over time. These include A'ak, Yaac, Yahk, Yahkh, and Yak.

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