As tourism season begins to ramp up in West Marin, the Marin County Board of Supervisors on Tuesday agreed to hire a consulting firm to produce a study focused on expanding parking and restroom capacity in West Marin over the next 50 years. The study will also look at alternatives and cost analyses for expanding wastewater treatment capacity in county parks and other tourist destinations. County Supervisor Steve Kinsey called the study a “first look” at the what the region will need to meet increased bathroom and parking use. “I consider a strategy and funding plan for managing visitors to be an important unmet need,” he said. “While this study will only be a start, it is a critical first step toward a responsible approach.” The study, to be conducted by AECOM Technical Services, Inc., will cost $61,424. In tandem, the National Park Service is looking at ways to account for the growing tide of tourists, according to spokesman John Dell’Osso. He said the Palomarin trailhead, in particular, has faced occasional closures due to a high number of visitors. A landscape architect hired a few months ago has recommended improvements, including “grading and filling with gravel as needed, defining parking spaces, having a double vault toilet and double trash/recycling bins, and a kiosk with interpretive information on what is ahead on the Coast Trail and wilderness ethics in the backcountry.” Work on those improvements will begin this summer, Mr. Dell’Osso said.