This training plan is designed by Treeline Endurance in collaboration with the organizers of the Copper Kings 100 Mile Endurance Run held in Butte, Montana in late June. We're excited to offer this plan **free** to runners who are already registered for the 2026 Copper Kings 100. Check your email for your promotion code from Onward Endurance.

Running Copper Kings 100 is a massive goal. This plan will help you to manifest it. The plan will build upon experienced runners who are either looking to run their first 100 mile race at Copper Kings, or make it their strongest 100 mile finish to date.

The plan is 20 weeks long, best started in late-January/ early-February.

This is a mountainous event. The plan is set up to prepare athletes accordingly. Therefore, to get the most from this training plan, you'll need:

-Access to steep and technical trails (primarily on weekends)
-Full gym access (Weights and treadmills that are capable of at least a 10% uphill grade)
-Flat-and-fast running access (either on treadmill or outdoor road-like surfaces)

We packed years of experience working 1-on-1 with ultramarathon runners like you into this plan. Key aspects of it include:

WEEKLY AIMS
A message at the start of every training week to guide you in how to thinking about your training for the week.

SYNCS TO YOUR WATCH
Every workout is set up to sync to your watch and guide you through the workout step-by-step.

STRENGTH
Robust routine for strength and durability, without massive time commitments.

PRECISE WORKOUT TARGETS
Distance, vertical gain/loss, and duration targets for every long run.

WARMUP/RECOVERY ROUTINES
2-10 minute routines done before and after each run to keep you adapting to your training, including a downloadable handout on post-run recovery fueling options.

MENTAL CUES + VISUALIZATION PRACTICE
Specific pieces of the CK100 course are called out in many sessions to prepare you for the hardest moments ahead of time.

COPPER KINGS HANDBOOK INTEGRATED
We’ve reviewed every letter and link of the CK100 handbook and incorporated it all directly into the plan.

SUPPORT FROM THE COACHES
Email support is available by the team who built this plan for Copper Kings for questions or issues.