Learn how to read a running elevation profile: grade %, climbs, descents, and where to adjust effort. Includes a free GPX viewer.
Elevation profiles look simple, but they're easy to misread. Focus on grade, climb length, and where the hardest sections land in the route.
It depends on distance, but look at total climb and sustained grades. A few long climbs can be harder than many small rollers.
Grade and placement matter. A steep climb late in the race can be more damaging than the same climb early.
Every page on this site has a Markdown mirror at the same path with a .md suffix (for example /calculator.md), and honors an Accept: text/markdown request header on the HTML URL. The calculations here are also available as callable tools through a free public MCP server — no account or API key.