Great day out with lots of people on Mt Williamson making the gully a bit scary. Mt Tyndall all to myself though I'm not sure I nailed the route tried two different definitions of North Ridge. 105F at the car made the final miles a bit rough.
5:40 to summit of Mt Williamson
8:28 to summit of Mt Tyndall
11:40 return to car
Propose for whoever crushes this in short order the FKT is amended to include the summits of Mt Williamson and Mt Tyndall. Seems a shame to run all the way up there and not go up both peaks.