Oregon and Dunsmuir, California. As a result, the Coast Starlight was initially split into two segments: Seattle to Klamath Falls and Sacramento to Los Angeles with a bus replacement service filling the gap between Klamath Falls and Sacramento. However, on July 2, 2021, it was announced that service would be discontinued between Seattle and Sacramento until July 14, 2021, with Amtrak Cascades replacing service for passengers booked between Seattle and Eugene. Through service resumed on July 15 using overnight buses between Sacramento and Klamath Falls, and full-route train operation resumed on August 23. A resurgence of the COVID-19 virus caused by the Omicron variant caused Amtrak to reduce the frequency of this route to five-weekly round trips from January to March 2022. Trains began running over the Point Defiance Bypass between Tacoma and DuPont, Washington starting on November 18, 2021. Future improvements The 2018 California State Rail Plan, prepared by Caltrans, outlines a number of planned improvements to rail infrastructure in the state of California. These proposals include near-term plans to create additional stops on the Coast Subdivision at Soledad and King City for use by the Coast Starlight. There is also a proposal in the Capitol Corridor Vision plan to improve the right-of-way shared by the Capitol Corridor and Coast Starlight between Oakland and Martinez. The proposal would re-route the train from along the coastline to a new tunnel through Franklin Canyon and a right-of-way next to California State Route 4 that would reduce the trip time by several minutes. Route Except for two sections, most of the Coast Starlight route is on former Southern Pacific lines now owned by the Union Pacific Railroad. The Coast Starlight runs over the following lines: BNSF Seattle Subdivision (ex-NP, later ex-BN): Seattle to Tacoma, Washington Sound Transit (SDRX) Point Defiance Bypass: Tacoma to DuPont, Washington BNSF Seattle Subdivision: DuPont to Portland, Oregon UP Brooklyn Subdivision: Portland to Eugene, Oregon UP Cascade Subdivision: Eugene to Klamath Falls, Oregon UP Black Butte Subdivision: Klamath Falls to Dunsmuir, California UP Valley Subdivision: Dunsmuir to Marysville, California UP Sacramento Subdivision (ex-WP): Marysville to Sacramento, California UP Martinez Subdivision: Sacramento to Oakland UP Niles Subdivision: Oakland to Elmhurst UP Coast Subdivision: Elmhurst to San Luis Obispo UP Santa Barbara Subdivision: San Luis Obispo to Moorpark, California Metrolink (SCAX) Ventura Subdivision: Moorpark to Taylor Yard, Los Angeles Metrolink (SCAX) River Subdivision: Taylor Yard to Los Angeles Union Station