I love the location of the race, it a beautiful course along the marina, across the golden gate bridge and back. However, when I ran it, the race was somewhat poorly organized. The biggest drawback was that there were not nearly enough aid stations and I was completely dehydrated by the end of the race. Additionally, although you can expect any SF course to be challenging, I found the course a little demoralizing because you climb almost all the way up to the elevation of the bridge, only to drop down and climb again. But I think if you are expecting that, its not a problem. The race has two events, a spring and a fall. I ran the fall and the weather was gorgeous, but it can be anywhere from very 40s/50s-80s, so be prepared. Keep in mind, I ran this race when it was just starting, so I am sure some of the organization kinks have been worked out by now.