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TRAIN FOR THE COURSE, NOT JUST THE DISTANCE

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© 2026 PR.RUN

For those who ♥ to adv.entu.re

PR YOUR NEXT RUN

Sean O'Brien

Train for Sean O'Brien

Malibu. Sean O'Brien hundred k. Backbone Trail. Twelve thousand feet above the Pacific.

62 mi+415 ft-418 ft17 hours810 ft to 864 fttech 5/10Checkpoints per race bookBackbone TrailMalibuWSER qualifierFebruary
Gradient profileOfficial race GPX
DIST--
ELEV--
GRADE--
  • Start820 ft
  • High864 ft
  • Low810 ft
  • Finish817 ft

What PR Run builds for this start line

  • Personalized plan from your baseline and this course profile
  • Aid-segment fuel rehearsals tied to checkpoint spacing
  • Structured gear kit from course intelligence
  • Race-day pacing, crew notes, and race-morning brief
  • Aid stations: 6 · longest gap ~20 km
  • Mandatory kit items: 2
  • Cutoff: 17 hours

The crux

Backbone Trail exposed ridges above Malibu (near mile 40)

Race details can change. Confirm current rules and logistics with the Official site.

Train for your race

Train for Sean O'Brien

Course-specific plan, fuel segments, gear kit, and race morning for Sean O'Brien.

Train for Sean O'BrienCheck your readiness

Official siteCheck readinessPredict finish timeFull race guideFoot care plan