Yep, very frustrating with all the "open space" that no one can use in Douglas County! I am down in Larkspur and have not been able to find anything around here (been looking for years).

Myself and a few neighbors’ just joined:

http://www.leadvalleyrange.com/

They are not as big as B.L but do allow Class 3 and you do not need to be an NRA member (required by B.L.)

It is about the same distance as to B.L. as lead valley.

They are new and still building out but do have several private ranges open as well as a 50Y and 100Y - working on a 500Y range.