The most likely event you mean is RAGBRAI , and its 2026 ride runs July 18–25, 2026 across Iowa. The official route page lists the 2026 towns and confirms it is the “shortest-ever route,” covering 391.4 miles with 16,027 feet of climb.

Schedule

  • July 18, 2026 to July 25, 2026.
  • The ride is a seven-day bicycle event across Iowa.
  • The full route includes Onawa, Harlan, Guthrie Center, Boone, Marshalltown, Independence, Dyersville, and Dubuque.

Why this fits

  • Your query says “West Iowa,” and the 2026 route starts in Onawa , which is in western Iowa.
  • A separate news report also described the 2026 ride as rolling across Iowa from July 18–25.

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Event Dates Notes
RAGBRAI LIII July 18–25, 2026 Official 2026 route and towns published; starts in western Iowa.

Other possibility

If you meant a smaller local bicycle rally in western Iowa rather than RAGBRAI, I don’t have enough reliable details from the available result set to name it confidently. The safest match from the available information is RAGBRAI.