You'll ruin your knees!
""...the truth that someday, you will go for your last run. But not today—today you got to run." - Matt Crownover (after Western States)
Lynn - would this race be part of the area you were talking about in the Headlands/North of GG bridge:
Golden hills marathon.
Re: altitude.. will I feel the altitude like shortness of breath, etc? Or is it just the constant change in altitude that will burn out my legs and leave me exhausted?