Science-backed trail and ultra running articles: training, pacing, nutrition, and race strategy.https://trailmath.run/enhttps://trailmath.run/blog/fueling-a-100k-ultra/https://trailmath.run/blog/fueling-a-100k-ultra/How to build a 100K fueling plan that survives contact with a real race: carbohydrate targets per hour, why GAP changes your burn rate, and how to plan around aid stations instead of hoping.Wed, 10 Jun 2026 00:00:00 GMTnutritionrace-strategyhttps://trailmath.run/blog/periodized-training-for-utmb/https://trailmath.run/blog/periodized-training-for-utmb/A periodized framework for UTMB: base, specific, and taper phases built around 10,000 m of climbing, 46.5 hours of cutoff pressure, and the reality of training around a full-time life.Mon, 01 Jun 2026 00:00:00 GMTtrainingrace-strategyhttps://trailmath.run/blog/grade-adjusted-pace-on-trails/https://trailmath.run/blog/grade-adjusted-pace-on-trails/Grade-adjusted pace turns a hilly run into a single effort-equivalent number. Here is how it works, why steep descents cost more than runners expect, and how to use it for pacing.Wed, 20 May 2026 00:00:00 GMTsciencepacing