The SF Dolphin South End Runners hosted a 5K and 12K at San Bruno State Park. The weather was perfect. The view from the trail really nice (only noticed in the warmup not during the run).
The 5K course went uphill for the first mile or so on a wide dirt/gravel trail. Then the course rolled up/down for a bit before descending to the single track Bog Trail before returning to the picnic area for the finish.
The 12K course then went around the peak and definitely had uphill. I only ran the 5K.
Great volunteers. Easy registration. Clear course instructions. Friendly people. And a great price. I'd definitely consider another one of their runs