Endurance Event Data Lives Here
OpenSplitTime is a free resource built by endurance athletes for the ultra community. OpenSplitTime makes it easy to collect, store, and play with endurance event data.
Recent Results
The Ranch 2025 2025 Running Up For Air (SLC) San Diego ARES Training ABC 50 (Anza Borrego Cuyamaca 50)
Plan Your Efforts
Runners, pacers, families, and crews can use OpenSplitTime to plan for ultras. Just estimate your finish time
and
OpenSplitTime will suggest where you need to be and when.
Hours of research converted to a few seconds? Yes please.
Search the Archives
Browse and play with endurance event data like you've never done before. Analyze your efforts, discover
your best segments, and find your peers. Much more is yet to come as the community gathers its data here.
You can find every Hardrock effort ever run.
Find Someone Search Hardrock Archives
Open to Race Directors
We love to compete, but many of us don't love to organize. And the tools for tracking and organizing endurance
events have been sorely lacking.
All that has now changed.
Full Documentation Create My First Event
Unprecedented Live Tracking Tools
OST Live Entry tools are revolutionary. OST learns from your time data. It gives you race progress for each aid
station. It tells you instantly where your runners last reported, where and when they are due next, and who is
past due and possibly lost.
OST Remote is our free iOS app for recording entrant times at aid stations. It syncs with OpenSplitTime and
simplifies the task of gathering time data over many aid stations and long periods of time.
Omniscience is pretty cool.
Endurance events change people.
They create hard challenges in a soft world. They bring us together when our natural inclination might be to wander alone. They help us feel the simple joys of food, warmth, and rest by exposing us to cold, hunger and discomfort. They help us realize how much more is buried within when we seem empty and dry.
Go git 'er done.
