State Route 49 (SR 49) is a north–south state highway in California that travels through the historic mining communities of the California Gold Rush of 1849. It is known as the Golden Chain Highway, and the road was initially lobbied for in 1919 by the Mother Lode Highway Association, a group of locals and historians. The highway begins at State Route 41 in Oakhurst, Madera County, in the Sierra Nevada, and continues in a generally northwest direction through eleven counties to its northern terminus at State Route 70 in Vinton, Plumas County.
The route passes through dozens of California Historical Landmark sites, including Marshall Gold Discovery State Historic Park, Sutter's Mill, the Empire Mine State Historic Park, and the towns of Placerville, Sonora, and Angels Camp. Segments of the highway are designated as a California Scenic Highway, and the northern portion between Nevada City and Sierraville forms part of the Yuba-Donner Scenic Byway, a National Forest Scenic Byway. SR 49 serves as a heritage and tourist route through California's Mother Lode country.
SR 49 starts at an intersection with SR 41 near Oakhurst. The road heads west before turning north before the town of Ahwahnee near the Wassama Roundhouse State Historic Park. SR 49 continues north, passing through Nipinnswassee before entering Mariposa County and the Sierra National Forest. Continuing to the west, SR 49 passes through Mormon Bar before running concurrently with SR 140 briefly through the town of Mariposa. Near the town of Mount Bullion, SR 49 passes by Mariposa-Yosemite Airport before turning northwest and going through Bear Valley and the intersection with CR J16. The highway passes by the southern edge of Lake McClure and intersects SR 132 in Coulterville before passing into Tuolumne County.
SR 49 continues north through the town of Moccasin, where SR 120 runs concurrently for several miles to the town of Chinese Camp. SR 49 then turns northeast and runs concurrently with SR 108, intersecting CR E5, into the city of Sonora. SR 49 splits from SR 108 and enters downtown Sonora as Stockton Street, turning north onto Washington Street before leaving the Sonora city limits. SR 49 intersects the north end of CR E5 before passing through Tuttletown and crossing into Calaveras County at the bridge over the Stanislaus River.
SR 49 then enters Carson Hill. Passing by New Melones Lake, SR 49 briefly runs concurrently with SR 4 in the city of Angels Camp.
SR 49 continues through Altaville. The highway continues into San Andreas, where SR 12 terminates. SR 49 continues into Mokelumne Hill, where it intersects with SR 26.
SR 49 then passes through Big Bar and across the Mokelumne River, which is located on the county line between Amador County and Calaveras County. SR 49 then runs concurrently with SR 88 briefly through the town of Martell before intersecting the eastern terminus of SR 104. SR 49 then runs west of Sutter Creek and Amador City, via a bypass around those two cities that was constructed in 2009, before reaching Drytown.
SR 49 then intersects the eastern end of SR 16 before passing through the city of Plymouth. The highway continues through Enterprise before crossing into El Dorado County and passing through the towns of Nashville, El Dorado, and Diamond Springs (the latter two as Pleasant Valley Road) before entering Placerville. SR 49 traverses downtown on Pacific Street and Main Street before continuing onto Spring Street, where it intersects the US 50 expressway at-grade before continuing north as Georgetown Road.
As it leaves the Placerville city limits, SR 49 intersects the southern terminus of SR 193 before continuing northwest as Coloma Road into the town of Coloma. In Coloma, the highway intersects with SR 153, a spur route to the Marshall Gold Discovery State Historic Park. SR 49 then continues through Lotus before turning north at Pilot Hill and intersecting the northern terminus of SR 193 at Cool. SR 49 continues through the Auburn State Recreation Area before crossing into Placer County and entering the city of Auburn as High Street for a short distance before turning west on Elm Avenue. SR 49 continues onto I-80 west at an interchange briefly until the interchange at exit 119B where SR 49 departs from I-80. SR 49 then continues almost due north out of the Auburn city limits.
SR 49 continues north, crossing into Nevada County and passing through Higgins Corner and Forest Springs. SR 49 becomes a freeway and enters the city of Grass Valley, where it then runs concurrently with SR 20 and interchanges with the northern end of SR 174. The SR 49/SR 20 concurrency continues as a freeway into Nevada City. SR 49 then splits from SR 20 at an at-grade intersection just after the freeway ends and heads west out of Nevada City.
SR 49 goes over the South Branch of the Yuba River near the Malakoff Diggins State Historic Park. SR 49 continues through the towns of Sweetland and North San Juan, where it crosses into Yuba County and enters Tahoe National Forest. The route goes through Log Cabin and Camptonville. SR 49 then crosses into Sierra County, where it passes through Goodyears Bar, Downieville, and Sierra City through forested terrain. After passing near Kentucky Mine Historic Park, SR 49 goes through Bassetts and Haskell Creek, then shares a wrong-way concurrency with SR 89 briefly through Sattley and Sierraville. SR 49 then leaves the forest as Loyalton Road, passing through the city of Loyalton and intersecting CR A24 before crossing into Plumas County as Vinton Loyalton Road, where SR 49 ends at SR 70 in the town of Vinton.
SR 49 is part of the California Freeway and Expressway System, and from SR 140 to a point north of SR 88 as well as from I-80 to SR 20 is part of the National Highway System, a network of highways that are considered important to the country's economy, defense, and mobility by the Federal Highway Administration. SR 49 is eligible to be included in the State Scenic Highway System, and from the Sierra-Yuba county line to Yuba Summit is officially designated as a scenic highway by the California Department of Transportation. The segment of SR 49 from SR 20 in Nevada City to SR 89 in Sierraville also forms part of the Yuba-Donner Scenic Byway, a National Forest Scenic Byway.
SR 49 is known as the Golden Chain Highway for the entire route. SR 49 is known as the John C. Begovich Memorial Highway from Jackson to SR 88 (honoring the California legislator and U.S. Marshal), and the Mother Lode Highway from Sonora to Auburn.
In its earliest days, the road was unofficially called The Highway of the 49ers. Beginning in 1919, the Mother Lode Highway Association, a group of locals and historians, lobbied for the creation of a highway to connect many relevant locations to honor the California Gold Rush and the 49ers. In 1921, the stretch of road from Sonora to Auburn was officially named The Mother Lode Highway. In 1951, the Golden Chain Council of the Mother Lode published a map and tourist guide to the highway, designed and illustrated by Fred Witta, Jr. The publication was called "California's Golden Chain: the Mother Lode Highway (State Highway 49)". In 1960, the organization published a revised version of the map and guide under the same title, this time designed and illustrated by William Wintle. This version covered Calaveras, Amador, El Dorado, Placer, Nevada, Sierra, Tuolumne, Mariposa, and Madera counties.
Like other California state highways, the California State Automobile Association in Northern California and the Automobile Club of Southern California were initially responsible for posting highway route signs, while the state maintained internal "legislative route numbers". In 1963, the entire highway was officially designated as SR 49 after decades of the state using those two separate number systems.
The Archie Stevenot Bridge, carrying SR 49 over New Melones Lake on the Stanislaus River, was named after Archie Stevenot, founder of the California Chamber of Commerce and officially named "Mr. Mother Lode" by the California State Legislature.
The SR 49 corridor was designed to connect historical locations and landmarks of the California Gold Rush. These include: