Race Pacer

Plan your pace. Predict your performance.

Race Pacer is your performance simulation tool for race day. Build the course, define your pacing strategy, and see how terrain, elevation, power, and intensity impact your real-world speed and finish time. Whether you're preparing for a marathon, triathlon, cycling race, ski event, or swimrun, Race Pacer helps you test strategies before you execute them.

Course-Based Simulation

Upload GPX files or draw your race route manually. Build single-sport or multisport courses, including transitions.

Elevation-Adjusted Speed Modeling

Your target pace is dynamically adjusted based on terrain. Uphills, downhills, and flats are calculated to reflect realistic achievable speeds.

Power-Based Cycling Analysis

Set target power and define aerodynamic properties. Use simple speed-to-power inputs or advanced metrics like CRR and CDA to estimate realistic bike splits.

Multisport Strategy Planning

Plan swim, bike, run, and transition times separately. Optimize pacing discipline by discipline for the best overall outcome.

Strategy Testing

Model aggressive starts, negative splits, fatigue slowdowns, or strong finishes. Understand how pacing decisions influence your final result.

Performance Forecasting

See estimated segment times and projected finish time based on your chosen pacing strategy.

Training Integration

USee total planned carbohydrate intake, fluid volume, sodium totals, and timing distribution across the full race.

Costs just 1% of race fee / month! Try today!

Race Pacer turns race strategy into measurable projections—so you arrive at the start line with a plan grounded in data, not guesswork.