I just tried a bushpilot flight over the Cascade Pass (a lot of nail-biting fun, but that's another story). In the Cascade area there are a number of wandering black lines on the sectional map with dots on one or both sides of the line. They don't appear in the list of map symbols.I thought first of all they might be symbols for all winter roads, but now I wonder if they are marking national park boundaries. Anyone know?The sectional I am using is the Matt Fox file from the library - thanks Matt :) It is such a large file that my graphics program IrfanView can't open it on my Win98 machines, but the XP laptop copes ok - maybe XP handles memory better for such an application.--Bryn

They designate the borders of a "Conservation Area" , which includes national parks, wildlife refuges, wilderness areas, National Recreation areas, national monuments, and a few others. Pilots are requested to maintain a minumum altitude of 2000 ft AGL inside these boundaries. If you look on the flip side of the sectional chart's legend page, there should be a short section explaining it. Tons of chart symbol info here:http://www.naco.faa.gov/index.asp?xml=naco/online/aero_guide

Thanks Dan, that's great information.--Bryn

It's a wilderness area, and on the actual maps, the symbol is shown, along with its description, down below the MOA and Restricted airspace tables.----------------------------------------------------------------John MorganReal World: KGEG, UND Aerospace Spokane Satillite, Private ASEL 141.2 hrs, 314 landings, 46 inst. apprs.Virtual: MSFS 2004"There is a feeling about an airport that no other piece of ground can have. No matter what the name of the country on whose land it lies, an airport is a place you can see and touch that leads to a reality that can only be thought and felt." - The Bridge Across Forever: A Love Story by Richard Bach