Phase 1 is to be about 520 miles ( 840 km ) long .
Phase 1 is planned to be completed in 2029 , connecting the downtowns of San Francisco , Los Angeles , and Anaheim using high - speed rail through the Central Valley .
Phase 1 is to be about 520 miles ( 840 km ) long , and is planned to be completed in 2029 , connecting the downtowns of San Francisco , Los Angeles , and Anaheim using high - speed rail through the Central Valley .