A race-prep field report: every ride, climb, and heartbeat on the road to the Sturdy Dirty. Expert course. Four timed stages. Home mountain.
At 211 ft of climbing per mile, Sturdy Dirty packs in more vert per mile than your typical Tiger lap (~185 ft/mi) or even Dirty Bloom (~170 ft/mi), about 40% of Dirty Bloom's total climbing in a third of the distance, roughly two Tiger laps back-to-back but punchier. Two sustained 1,000–1,500 ft climbs with pitches hitting ~14%. Train it: climb-dense laps, Z5 efforts on the steep stuff, and dialed fueling for a 2.5–3.5 hr push.
Nearly every recent ride averages 149–164 bpm, solid Zone 4, the "always moderately hard" gray zone. The engine is clearly there. Race-day gains now come from polarizing: make easy days genuinely easy (Z1–2, spin the SOMA) so you actually recover, and add short Z5 intervals and sprint repeats on Tiger to sharpen the top end. That, plus skills and course recon, beats more Z4 grind.
| Ride | Dist | Climb | Time | Effort |
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