I own a Model S 70D and just received notice of a new Supercharger opened at Mammoth Lakes, CA. I was wondering if I charged to 90% (216 rated range) in Manteca, CA if I can make it there. TESLARATI.com calculates 185 miles which would be 85% efficient using entire charge. Of course this is not a winter trip and I have no idea how altitude up-grades and down-grades affect efficiency. When Tesla decides to put in a Supercharging Station (SC) there must be some idea of accessibility, SC to SC, for different model cars. I rarely would charge beyond 90% because of the time required to get there but I HATE range anxiety! I have driven across country, San Francisco to Cheyenne, WY and eastward to northern Wisconsin so I am pretty comfortable traveling the SC routes and using KOA campgrounds as filler locations. I want to do more CA day trips but want the convenience of SC routes. I am seeking knowledgeable suggestions and figure this is good place to start. I can't see anywhere Tesla provides travel advice regarding SC to SC travel. Thanks to anyone who can help.