I'm Caroline Claassen, a UESCA certified running coach. I've run 13 half marathons, with a personal best of 1:23:45, and I coach runners training for exactly one distance: 21.1km. Not a marathon plan cut in half. Not a generic app. A coach who lives in this distance.
At my third half marathon, in Lisbon, I hit the wall completely and missed my goal time. Looking back, it wasn't one big mistake, it was three smaller ones stacked together: fueling I hadn't practiced, strength work I'd skipped all block, and a race pace I picked with my ego instead of my training data.
Fixing those three things is what took me from that race to a 1:23:45 personal best. It's also what most half marathon training plans get wrong: they're either a marathon plan with the back half deleted, or a generic app that doesn't know your race is 21.1km and not 42.2km or 5km. The half marathon has its own pacing logic, its own fueling window, its own taper. That specificity is the whole job.
RunLetters Half Marathon Coaching is built as a real coach, not an app: a personalized plan that adjusts as your training actually goes, live group sessions twice a week for strength and mobility, direct coach access through messaging and forum responses, and monthly webinars on nutrition, pacing, and mindset. Everything syncs to your watch through Final Surge from day one. No sales call, no lengthy contract.
Before you commit to anything, these are free and give you a real sense of how I think about pacing and training load.
RunLetters Half Marathon Coaching pairs you with a real coach, not an app, who builds your training around your goal, adjusts the plan as your training actually goes, and is in your corner from week one to the start line. Start with a 7-day free trial: try the first week of training, attend a group session, see how it feels.
Start your 7-day free trial