why is part of oregon in mountain time
proximity to Boise, Idaho
title: Oregon text: eight geographical regions. In Western Oregon: Oregon Coast (west of the Coast Range), the Willamette Valley, Rogue Valley, Cascade Range and Klamath Mountains; and in Central and Eastern Oregon: the Columbia Plateau, the High Desert, and the Blue Mountains. Oregon lies in two time zones. Most of Malheur County is in the Mountain Time Zone, while the rest of the state lies in the Pacific Time Zone. Western Oregon's mountainous regions, home to three of the most prominent mountain peaks of the United States including Mount Hood, were formed by the volcanic activity of the Juan de Fuca Plate, a title: Time in Oregon text: Time in Oregon Time in Oregon is divided into two zones. The vast majority of the state is contained in the Pacific Time Zone. Most of sparsely populated Malheur County, including its largest city, Ontario, and its county seat, Vale, are in the Mountain Time Zone due to their proximity to Boise, Idaho. The time zone division occurs at the southwest corner of township 35S, range 37E (approximately 42.45 degrees north latitude), continuing east to the state line, then south along the Oregon-Idaho border to the Nevada state line. Drewsey in Harney County is officially in the Pacific Time Zone, title: Time in Oregon text: but some residents unofficially observe Mountain Time due to proximity to Malheur County. Local businesses and the Oregon Department of Transportation strictly enforce the practice of Pacific Time, however. In the IANA time zone database, Oregon is contained in two zones: Time in Oregon Time in Oregon is divided into two zones. The vast majority of the state is contained in the Pacific Time Zone. Most of sparsely populated Malheur County, including its largest city, Ontario, and its county seat, Vale, are in the Mountain Time Zone due to their proximity to Boise, Idaho. The time zone division occurs at title: History of Oregon text: History of Oregon The history of Oregon, a U.S. state, may be considered in five eras: geologic history, inhabitation by native peoples, early exploration by Europeans (primarily fur traders), settlement by pioneers, and modern development. The term "Oregon" may refer to: The history of Oregon, and of the Pacific Northwest, has received little attention from historians, as compared to other regions of the American far west. Volcanic activity in the region has been traced to 40 million years ago, in the Eocene era, forming much of the region's landscape. In the Pleistocene era (the last ice age, two million to title: Mountain Time Zone text: is generically called Mountain Time (MT). Specifically, it is Mountain Standard Time (MST) when observing standard time, and Mountain Daylight Time (MDT) when observing daylight saving time. The term refers to how the Rocky Mountains, which range from northwestern Canada to the US state of New Mexico, are located almost entirely in the time zone. In Mexico, this time zone is known as the Zona Pacífico (Pacific Zone). In the US and Canada, the Mountain Time Zone is to the east of the Pacific Time Zone and to the west of the Central Time Zone. In some areas, starting in