The San Diego Creek bicycle path is a cycling route in the city of Irvine, California. The path connects major points such as Newport Beach, University of California, Irvine, Boomers Irvine, Colonel Bill Barber Park, Irvine Civic Center, Irvine Crossroads shopping center, Woodbridge High School, Woodbridge Community Park, Atria Senior Residential Area, Windrow Community Park and Irvine Medical Complex, before reaching Irvine Spectrum Center. It also runs through the majority of Irvine's neighborhoods such as Westpark, Woodbridge, and Oak Creek. The path begins where the San Diego Creek empties into Upper Newport Bay.
Main trail
One entry point is Bayview Way, just off Jamboree Road between Route 73 and the bridge over San Diego Creek. Riders can enter the path here and proceed North back to Jamboree Road and then East across the bridge, then take the ramp under the bridge.
Heading North, the path passes through a wetlands area until it parallels University Drive with University of California, Irvine on the opposite side. Access is continuous along this stretch, although public parking is not.
University Drive veers East and the path and creek continue due North, with the wetlands giving way to a concrete-bottom storm drain. The path passes under Main Street and Alton Parkway, each of which includes an access ramp. The path then reaches a fork in the creek near Colonel Barber park, where public restrooms and water are available. The path crosses to the opposite side on a bridge and continues on the Eastern branch of the creek, leading under more underpasses with street access at Harvard Avenue and Culver Drive.
The path passes through the residential center of Irvine, municipal parks, and a lawn-like slope around the creek. There are several at-grade crossings of avenues. At one point, there is another bridge that crosses the creek and is part of another bike trail that runs perpendicular to the creek trail, running through the central park of Irvine and frequented by a large number of pedestrians.
The creek path continues to the East and culminates in a landscaped section that includes two short bike tunnels as it passes through Windrow Park. The last tunnel emerges on the East side of Jeffrey Road without clear signage. Making a sharp left curve, the trail runs concurrently south with Jeffrey Road to the car bridge over the creek, where there is an entrance to the continuation of the path separating from Jeffrey Road. The path runs past the Oak Creek community until it reaches the Irvine Medical Complex and the industrial park outskirts of Irvine, crossing under Sand Canyon Avenue and Laguna Canyon Road. The path continues for a short stretch on the South side of the creek and dead-ends. It is possible to cross over to the North side of the creek and continue to the Highway 133 underpass, and emerge into the Irvine Spectrum Center.
Alternate return path
There is an alternate return path that includes Class 2 bike lanes, a Class 1 path through the hills above Irvine, and a Class 1 path built as part of the planned subdivisions of older Irvine. Access is South on Old Laguna, which leads through quiet industrial park areas to a bridge over Interstate 405, and on to an area of newly developed townhomes all on Class 2 bike lanes. Turning right at Quail Hill Parkway leads to a traffic circle; to the left at the circle, uphill, is the start of the new Class 1 path.
The Class 1 path begins on an uphill stretch, followed by a downhill ride through a canyon area, part of a land development named Shady Canyon. Ultimately, the path leads to an entrance guard house, and continues to the left on a section of Class I path. Taking the sidewalk to the right of the guard house leads back to surface roads. Taking the first right on Sunnyhill leads to a crossing into a small park, where there is a sidewalk / bike path that heads back uphill. This ends on a downhill street which leads to an intersection. Turning left at the intersection and using the sidewalk, which doubles as a bike path, leads downhill to the entrance to another Class 1 bike path, which snakes downhill on a narrow greenway passing under streets in special tunnels.