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Start lines are loud, data is messy, and mountains don’t care about your watch. We sat down with coach and ultrarunner Addison Smith to sort the signal from the noise: when to trust rate of perceived exertion, when heart rate zones help, and how to train for races that start cool, turn hot, and punish mistakes. Addison opens with a candid Black Canyon 100K recap—pacing with restraint, GI trouble in the middle miles, and the stubborn choice to keep fueling until the legs came back—then flips it into a toolkit you can use right away.

We break down a simple, usable RPE scale and show how to layer it with heart rate ranges without becoming a slave to numbers. On steep and technical terrain, grades, heat, and altitude can skew heart rate and pace; RPE keeps you honest. For heat adaptation, Addison shares a safe, effective 7–10 day protocol using sauna or hot baths after easy sessions in the 2–3 weeks before race day. The rule is “stimulus, not another workout”: 20–30 minutes, hydrate well, shorten after long runs, and avoid the temptation to “win” the sauna.

If Pikes Peak or big vert is on your calendar, you’ll want the over-under session in your toolbox. We explain how short VO2 surges followed immediately by threshold or steady state teach your body to shuttle lactate and your mind to settle when it craves a break—exactly the skill you need cresting steep switchbacks and rolling into runnable terrain. We also tackle the puzzle of why a crusher on the Manitou Incline might still have a modest mile PR: specificity, mechanics, and background sports make climbing strength and flat speed different beasts.

Throughout, we talk block training vs “a bit of everything,” the real role of zone two, and how life stress quietly shifts your zones day to day. We close with a reality check on coaching changes—why results often lag new systems—and shout out standout CTS performances at Black Canyon. Subscribe, share with a training partner, and leave a quick review to help more trail athletes find the show. What guides your long runs most—heart rate, pace, or feel? Tell us after you listen.

Follow Addison on IG - @addison_smith16

Contact Addison for Coaching - @CTS

Follow James on IG - @jameslauriello

Follow the Steep Stuff Podcast on IG - @steepstuff_pod