Barstow has grown quite a bit since this photo was taken. Shown here, the original Main Street exit, which was originally built as a freeway-freeway interchange meant for US 466 / State 58 and connected Main Street (Former US 66 and US 91) to the then-new freeway. The Main Street interchange was redone in 1998 …
A Santa Ana wind event in January 2026 cleared the air after a storm, revealing some impressive vistas. Here, you can see snow-capped Mt San Gorgonio in the San Bernardino Mountain, about 90 miles away from the University City area of San Diego at sunset. The hills in the middle-ground are near San Marcos.
Shown here, I-805 (upper) crosses the 52 freeway (lower) at San Clemente Canyon. Built in 1972, it formed the eastern terminus of the 52 for many years. In 1987, was extended to Convoy St. I-805 also follows the former boundary between the San Diego Mission Lands (east) and San Diego Pueblo Lands (west). This becomes quite evident in the North Park area where Boundary Street runs quite close to the freeway.
Hidden below I-5 just north of Valencia Blvd next to a drainage basin, a bit of US 99 history remains in Santa Clarita, California. A culvert, dating to 1929, has survived through an expressway upgrade in 1949, freeway construction in 1967, bridge replacement construction in 2001, and current widening work in 2022. How much longer it will last is unknown but so far it has withstood the test of time.
The Greenspot Road bridge, locally known as the “Erector Set Bridge” has an interesting history. It was originally built in 1912 located near Victorville at the Mojave Narrows. In 1932, the bridge was dismantled and replaced with a wider span for US Highway 66. In 1933, San Bernardino County purchased a portion of the span and rebuilt it over the Santa Ana River between Mentone and Highland. The bridge remained in general use until 2015 when it was bypassed by a new bridge to the west. Today, the bridge is a part of a bicycle trail along the Santa Ana River.
To get to the bridge, use either the 5th St / Greenspot Road exit on State 210 (Exit 83) from the west or via State 38 (Mill Creek Road) and Garnet St from the east.
Southern California Regional Rocks and Roads
Exploring the highways, geology, history and landscapes of Southern California.