North of Clearwater river the climate is comparatively mild, the maximum in 1902 (96° F.) being lower than the highest temperature in the state and the minimum (- 16°) higher than the lowest temperature registered.
The state supports three parks - Itasca state park (22,000 acres, established in 1891), about the sources of the Mississippi, in Clearwater, Becker and Hubbard counties; the St Croix (established in 1895), in Chicago county, across the St Croix from the Wisconsin state park of the same name, and including the beautiful Dalles of the St Croix; and the Minneopa state park (established in 1905), containing Minneopa Falls, near Mankato.
The south portion of its boundary is the Snake river, which separates it from Idaho, but from the confluence of the Snake and Clearwater rivers (a little W.
The grizzly bear is now rare in the United States, save in the Yellowstone Park and the Clearwater Mountains of Idaho, though more common in British Columbia.
As the boundary between Idaho and Oregon (and for a short distance between Idaho and Washington); turns again at Lewiston (where it ceases to be the boundary, and where the Clearwater empties into it) to the W.
The first recorded exploration of Idaho by white men was made by Lewis and Clark, who passed along the Snake river to its junction with the Columbia; in 1805 the site of Fort Lemhi in Lemhi county was a rendezvous for two divisions of the Lewis and Clark expedition; later, the united divisions reached a village of the Nez Perce Indians near the south fork of the Clearwater river, where they found traces of visits by other white men.