Planning Department Functions

Current Projects

General Plan

Environmental Review

Planning Commission

Plans, Laws, Ordinances, and Studies

Application Download


Energy Reduction / Renewable Energy

Interactive Mapping (GIS)



Contact Information

Yucca Mountain Office

Inyo County's Main Website


Planning Home

Mailing List

Notification of Upcoming Public Meetings and other relevant Adventure Trails Information

Adventure Trails of the Eastern Sierra ("Assembly Bill 628 Implementaion Update")  

Public Comment

The public can comment via e-mail on any issues surrounding the designated combined-use routes at More information regarding Monitoring and Reporting related to the Adventure Trails can be found at:

All County maintained streets and roads (paved or dirt) are considered to be ‘highways’ under the California Vehicle Code. Currently, the combined-use of County maintained roads by OHV is only allowed on the three approved combined-use routes described below. The project proponents who proposed these combined-use routes refer to the routes as "Adventure Trails."

On July 14, 2015, the Independence No. 1 combined use route was opened for combined use by qualifying OHVs. On July 24, 2015, the Lone Pine No. 1 combined use route will also open for qualifying vehicles. Bishop No. 15 was opened for combined use on August 5, 2015. Maps showing those routes can be viewed by following the highlighted links.

Assembly Bill 628 Monitoring & Reporting

Section 14(f) of the Inyo CountyImplementing Procedures state that: The Public Works Department shall maintain a website that is a central hub for collecting public and public agency comments and complaints on the combined-use routes which shall include all correspondence from the public and public agencies regarding all combined use segments.

On October 7, 2011, the California State Legislature passed Assembly Bill 628, which allows for Inyo County to establish a pilot project to designate combined-use highway segments up to 10 miles long on unincorporated County roads to link existing off-highway-vehicle (OHV) trails and trailheads on federal Bureau of Land Management or United States Forest Service lands, and to link OHV recreational-use areas with necessary service and lodging facilities, in order to provide a unified system of OHV trails in the Owens Valley. The portion of the combined-use routes that are inside of the City of Bishop are being designated pursuant to the California Vehicle Code which permits up to three miles to be so designated. The proposed combined-use routes are all on existing streets and roads that are part of the Inyo County and City of Bishop Maintained Mileage Systems.

The Board of Supervisors considered the Adventure Trails Project at a public hearing on January 22nd, 2014.  The Board certified the Enviromentnal Impact Report for the project, and at the request of the applicants approved 7 of the 38 proposed routes. Additional information can be found below:

Maps of Open Adventure Trails of the Eastern Sierra Routes

OHV users on all combined-use routes must:

  • Drivers must have in possession a valid driver’s license of the appropriate class for the vehicle being operated.
  • Ride during daylight hours only and not earlier that 7:00 am and no later than 8:00 pm.
  • Have an operational stop light.
  • Have insurance in accordance with the provisions of article 2 (commencing with Section 1160230) of Chapter 1 of Division 7 of the California Vehicle Code.
  • Obey the posted speed limit for OHVs on combined-use roads and, in residential areas, drive no faster than 15 mph.
  • Use a vehicle that has rubber tires.
  • Pass at least three (3) feet away from bicyclists, horses, and pedestrians.
  • Slow to 5 mph when passing horses or pedestrians.
  • Ride only on existing trails.
  • Not stop in flowing water.
  • Drive in the middle of the vehicle lane.
  • Not drive on the shoulder.
  • Use existing trails when exiting a combined-use route.
  • OHV operators must operate the OHV in accordance with the vehicle manufacturer’s recommendation for use of the vehicle.

Background Information and Frequently Asked Questions


CEQA Documents



Original Project Applications

Project applications, information submitted to the California Highway Patrol, and project vicinity maps. (Please note these maps do not reflect the CHP Safety Determination for the Adventure Trails Project.  To find the most current information, please refer the maps listed above.)

Additional information can be found on the Inyo County Local Transportation Commission website at:



Please contact the Planning Department at or by phone at (760) 878-0263








Copyright 1998-2007 County of Inyo.