Lassen Volcanic National Park in California at 1: 48,000 in a series of detailed, contoured maps from Earthwalk Press with cartography based on the USGS topographic survey of the country plus additional information for visitors, printed on light, waterproof and tear-resistant synthetic paper. Maps in this series have contours usually at 40 feet and all heights are also given in feet. Colouring shows forested areas, plus, where necessary, additional graphics indicate other important topographic features such as marshland/swamps, moraine, etc. Hiking trails are highlighted, showing where appropriate their trail numbers and/or names. Icons highlight locations of trailheads, campgrounds, picnic areas, ranger stations, plus where available other recreational facilities. Local road network indicates light duty and unimproved dirt roads. GPS coordinates are given as margin ticks.Each title includes comprehensive additional text with useful information, including weather and water warning, regulations, etc, usually prepared by local summer rangers with good knowledge of the area.