State Route 261 (SR 261) is a state highway that forms part of the Eastern Transportation Corridor toll road system in Orange County, California that is operated by the Transportation Corridor Agencies.

While Jamboree Road has an interchange with I-5, SR 261 does not and instead passes underneath the interstate without any connecting ramps.

Following this is the Portola Parkway exit, after which SR 261 passes through hilly, wilderness terrain alongside the Irvine Village of Orchard Hills to the east and the border with Tustin to the west.

[10] And on October 2, 2019, the license plate tolling program, under the brand name "ExpressAccount", was discontinued.

As of July 2024[update], the gantry uses a variable pricing scheme based on the time of day for FasTrak users (it is not truly congestion priced because toll rates come from a preset schedule and are not based on actual congestion); non-FasTrak drivers must pay the $3.46 maximum toll regardless of the day and time.