Limits RegistryPUBLIC RECORD
Limits RegistryEthiopia's Tigst Assefa ran 2:15:41 at the 2026 London Marathon on April 26, 2026 — the fastest marathon ever run by a woman with no male pacers. World Athletics tracks this as a separate category from the mixed-sex record because male pacers measurably improve women's race times.
The question, scope, and sources behind this Registry record.
Ethiopia's Tigst Assefa ran 2:15:41 at the 2026 London Marathon on April 26, 2026 — the fastest marathon ever run by a woman with no male pacers. World Athletics tracks this as a separate category from the mixed-sex record because male pacers measurably improve women's race times.
The fastest time recorded for a woman to run the standard marathon distance of 42.195 km in a World Athletics record-eligible road race with no male competitors or pacers.
Change a parameter to stress-test whether a proposed result is still inside the published specification. This is an audit aid, not a proof checker.
This record has no editable parameters. Read the formal question and assumptions before challenging it.
Current frontiers derived from accepted Claims.
An observed or demonstrated result; no opposing bound is implied.
The frontier is not sacred
Most progress starts with a disagreement that survives contact with evidence. If you can push the known lower bound up or pull the upper bound down, show us the work.
≥ when you have shown that at least this value is achievable.≤ when you have shown that anything above this value is impossible.No vibes. State the value, define the scope, and link the paper, proof, code, or reproduction that lets another person check it. Editors review every challenge before the public record changes.
Challenge this recordAssertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
limitsregistry.com/limits/LR-MARATHON-WOMEN-ONLYNo active verified bounties are linked to this Limit.
View verified bounty tracker ↗No accepted machine-checked reproductions are recorded for this Limit.
Limits Registry. LR-MARATHON-WOMEN-ONLY. Women's marathon (women-only race). 2026.