The 3M3D Grand Slam is such a unique event, you will probably struggle to find an appropriate training program. Our best advice is that you train as if for a marathon, but include a second long run on the weekend, so you are doing back-to-back long runs to train the body on how to deal with recovery/nutrition over a couple of days of stress. There are PLENTY of hills, so don’t neglect your hill training, or you will be sorry. The event is mostly on trails, so train on trails when you can.
Keen to train in a group leading up to the 3M3D, or get access to expert advice from running coach and 10x finisher of the 3M3D? Join the 2022 Summer Squad.