Field notes

Notes from the long ones.

Training science, technical deep-dives, and the messy details of building a tool for ultra runners.

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May 12, 2026
RunPact Team
training plansultra running

A Flat 50k and a Trail 50k Are Not the Same Race

Two runners. Same distance. Same goal time. Wildly different races. If your training doesn't account for the terrain you're actually running on, you're preparing for the wrong event.

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Apr 30, 2026·RunPact Team

Six Plan Templates, Built Around Real Ultra Races

Not every ultra is the same race, and not every plan should be the same plan. RunPact now ships with six purpose-built training templates — each one a different blueprint for a different kind of ultra.

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Mar 9, 2026·RunPact Team

Final Stretch: One More Testing Pass, Then We Launch

A massive amount of work has gone into RunPact since January. Here's what shipped, where we stand, and why we're confident a soft launch is coming very soon.

updatesreleaselaunch
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Feb 12, 2026·RunPact Team

Training Plans Built for Ultrarunners (Not Adapted from Road Running)

There's no TrainerRoad for ultrarunners. Most plan generators assume flat roads and marathon distances. We built something different — and it's just getting started.

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Jan 29, 2026·RunPact Team

Road to Soft Launch: April 1, 2026

A quick recap of what’s shipped since November and what we’re finishing next. Soft launch target: April 1, 2026.

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Nov 15, 2025·RunPact Team

What's New: Better Design, Smarter Training, Way Fewer Bugs

We've been busy making RunPact better. New button design throughout, intelligent pace predictions for hilly runs, easier workout logging, and tons of fixes based on your feedback.

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Oct 18, 2025·RunPact Team

How RunPact Predicts Your Race Time (Without AI Hype)

In an era where AI has become a buzzword, we want to be transparent about what actually powers RunPact's race time predictions. Spoiler: it's not a large language model, and it doesn't use any trendy AI techniques you're probably thinking of.

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Sep 6, 2025·RunPact Team

Major Updates: Enhanced Training Plans, 3D Visualization Polish, and Stripe Integration

Since mid-August, we've been busy polishing existing features and adding new capabilities. Here's what's new in RunPact: enhanced training plan creation, improved 3D visualization, and a complete Stripe integration for subscriptions.

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Aug 17, 2025·RunPact Team

Under the Hood of Runpact: 3D Visualization and What's Next

A look into the technology that powers our platform, our new 3D course visualization, and what's on the roadmap for ultra runners.

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