Race Difficulty Analyzer
Evaluate how terrain, weather, and altitude will hit on race day. Get a difficulty score, pacing adjustments, and action items to sharpen your plan—or embed the analyzer for your athletes.
Quick presets
Overall score
55
Category
Serious Grind
Significant elevation or environmental stress. Respect the course.
Dial in hill strength and practice power hiking if appropriate.
Pacing delta
+0:22 / mile
Adjust per-mile goal pace relative to a flat, temperate benchmark. Longer ultras may require larger adjustments and structured hiking intervals.
Primary stressors
Benchmark comparison
Rolling hills with the Newton section and variable spring weather.
Sustained climbs, exposed coast, and unpredictable wind.
World Marathon Major, famously flat and fast.
Action plan
- Schedule dedicated hill/strength blocks and downhill running practice.
Share your analysis with teammates or embed the analyzer on coaching sites, newsletters, or your race briefing.
<iframe src="https://www.42cal.com/tools/difficulty-analyzer?embed=true" title="Race Difficulty Analyzer by 42Cal" width="100%" height="720" style="border:1px solid #e5e7eb;border-radius:12px;"></iframe>
Embed tip: set height="720" (or taller) to keep the analyzer fully visible inside your layout.