California State Route 330

At its southern terminus, SR 330 begins in San Bernardino at SR 210. It is a four lane freeway for approximately a mile, then turns into a two-lane expressway for four additional miles and a conventional two-lane highway for the remainder of its length. It runs northeasterly from the San Bernardino Valley into the mountains to Running Springs, where it ends at State Route 18. The entire route is in San Bernardino County.

SR 330 consists of approximately 15 miles (24 km) of six-percent grade road, and is one of three roads from the San Bernardino Valley to the resorts of the San Bernardino National Forest. It alternates between long, straight stretches and curved sections. There are three passing lanes, at the 2,200-foot (670 m) level, the 4,000-foot (1,200 m) level, and the 5,600-foot (1,700 m) level.

SR 330 is part of the California Freeway and Expressway System,[2] and the southernmost freeway portion is part of the National Highway System,[3] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[4] SR 330 is eligible to be included in the State Scenic Highway System,[5] but it is not officially designated as a scenic highway by the California Department of Transportation.[6]

SR 330 was originally a part of Legislative Route 207, defined in 1937. It was signed as SR 30 until 1972, when that route was redefined to continue south along former SR 106 rather than continue northeasterly along SR 330.[7]

Not including Interstate and U.S. highways, SR 330 was one of only three routes in California which is numbered based on the number of a current or former parent route (the others being SR 299 and SR 371). This relationship was lost once the remaining portions of former SR 30 were signed as SR 210.

In December 2010, a part of SR 330 was washed out, forcing the closure of the entire route for several months.[8] Access to the route was restricted to local residents only. It was reopened in May 2011. Its closure was cited as a reason for low attendance at ski resorts for the year, as SR 330 links to the resorts.[9]

All exits are unnumbered along the freeway segment of SR 330 between SR 210 and Highland Avenue. Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment of Route 30 as it existed at that time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The entire route is in San Bernardino County.

Location	Postmile [1][10][11]	Destinations	Notes
San Bernardino	R28.70	SR 210 (Foothill Freeway) – Redlands, Pasadena	Southbound exit and northbound entrance; former SR 30; future I-210; SR 210 exit 81
San Bernardino–Highland line	R29.60	Highland Avenue
San Bernardino		North end of freeway
Running Springs	43.89	SR 18 (Hilltop Boulevard) – Running Springs	Interchange with northbound exit only
		SR 18 west (Hilltop Boulevard) – Lake Arrowhead	Interchange with southbound exit only
	44.12	SR 18 – Big Bear Lake, Lake Arrowhead
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Incomplete access

•  California Roads portal

Wikimedia Commons has media related to California State Route 330.

• Caltrans: State Route 330 highway conditions
• Caltrans Traffic Conditions Map
• California Highway Patrol Traffic Incidents
• California @ AARoads.com - State Route 330
• California Highways: SR 330