1743: Pierre De la
Verendyre discovered Rocky
Mountains
1803: The Louisiana
Territory was purchased by
the U. S. from France
1805: Captains Lewis
and Clark discovered Idaho
at Lemhi Pass
1809: Britain opened
first trading post;
Kullyspell House was built
1810: Fort Henry,
the first American trading
post established
1811: Pacific Fur
company expedition explored
Snake River Valley;
discovered Boise Valley
1820: Treaty between
Spain and U. S. established
southern boundary of Idaho
at 42nd parallel
1823: Battle fought
in Lemhi Valley between
Snake River explorers and
Piegan Indians
1824: U. S. received
Northwest Territory from
Russia in treaty
1832: First crossing
of Rocky Mountains in
covered wagons; battle of
Pierre's Hole between fur
trappers and Grosventre
Indians
1843: Oregon Trail
established in Idaho
1852: Gold
discovered on the Pend
Oreille River
1854: Twenty-one
immigrants massacred in
Boise Valley by Snake River
Indians
1863: Idaho
Territory organized; Bear
River Massacre, the West's
largest slaughter of
Indians, occurred
1865: Boise became
capital of Idaho
1877: Nez Perce
Indian Wars took place
1878: Bannock Indian
Wars were fought
1880: Lead and
silver lodes were discovered
in Wood River area
1890: Idaho became
43rd state on July 3; first
session of Idaho legislature
met
1897: Bitterroot
Forest Reserve was
established to protect bison
1906: Largest
sawmill in U. S. began
operations at Potlatch
1910: Forest fires
consumed one-sixth of
Idaho's forests, destroyed
many communities
1915: Arrowrock Dam
completed
1917: Statewide
prohibition went into effect
1924: Craters of the
Moon National Monument
established; Black Canyon
Dam completed
1931: State income
tax law adopted
1934: Idaho became
number one in U.S. in silver
production
1935: Statewide
prohibition repealed
1942
Japanese-Americans placed in
internment camps at Hunt
1949: National
Reactor Testing Station near
Arco established
1955: Arco, Idaho,
became first town lit by
atomic power
1960: Seven-month
strike by miners at Bunker
Hill Mine; forest fires in
Hells Canyon and Idaho City
area
1961: Ernest
Hemingway died in Ketchum
1972: Sunshine Mine
fire in Kellogg killed 91
1976: Teton Dam
collapsed, killing 11 and
forced over 300,000 to
evacuate
1980: Northern Idaho
covered with layer of
volcanic ash from eruption
of Mt. St. Helens in
Washington; 18 hour riot at
Idaho State Prison caused $2
million in damages
1983: Earthquake in
Lost River Valley killed two
and caused millions of
dollars in damage
1985: Grasshopper
infestation destroyed great
areas of farmlands
1989: Forest fires
burned thousands of acres in
south central Idaho; Idaho
lottery began
1991: Kirby Dam
collapsed, electrical power
cut off to residents,
arsenic, mercury, cadmium
dumped into Boise River
1992: Fire caused
$3.2 million in damages to
State Capitol; worst forest
fire season in Idaho's
history
1994: Wildfires
burned approximately 750,000
acres; Picabo Streeet won
Olympic silver medal in
downhill skiing
1995: Picabo Street
became first American to win
World Cup downhill title
1996: Northern Idaho
hit with major floods
1997: New Year's day
floods occured in southwest
Idaho
2000: 559,183 acres
burned in forest fires
2001: 24 counties
declared drought disaster
areas
2003: Longest
legislative session in
history lasted 118 days
2005: Nez Perce
water agreement ratified,
tribe received annual rights
to 50,000 acre-feet water
from Clearwater River and
$80 million cash.
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