# 2026-16341: Chicago triathlon gets Coast Guard no-boat bubble.

2026-16341, Safety Zone; Lake Michigan, Chicago, IL, is a Federal Register rule from Homeland Security Department, Coast Guard published 2026-08-11, effective 2026-08-23; PRIA reads it as touching household money (as of 2026-08-18).

- Canonical: https://policyrisk.com/federal-register/2026-16341
- As of: 2026-08-18
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-16341
- Title: Safety Zone; Lake Michigan, Chicago, IL
- Type: Rule
- Agencies: Homeland Security Department; Coast Guard
- Citation: 91 FR 51592
- Published: 2026-08-11
- Effective: 2026-08-23
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 1625-AA00
- Last updated: 2026-08-18

## In one line

Chicago triathlon gets Coast Guard no-boat bubble.

## Summary

On August 23, 2026, from 6 a.m. to 10:30 a.m., a temporary safety zone will be set up in Monroe Harbor, Lake Michigan, Chicago, to keep everyone safe during the Chicago Triathlon swim event. Boats and people can’t enter this area unless the Coast Guard says it’s okay. This quick action helps protect swimmers, vessels, and the environment without any extra costs or delays.

## Abstract

The Coast Guard is establishing a temporary safety zone for navigable waters within a small area of Monroe Harbor in Lake Michigan in Chicago, IL. This action is necessary to protect personnel, vessels, and the marine environment from potential hazards created by the Chicago Triathlon swim event. Entry of vessels or persons into this zone is prohibited unless specifically authorized by the Captain of the Port, Sector Lake Michigan or their designated representative.

## Effects PRIA read

- Monroe Harbor safety zone closure: cost, low. You may not enter or operate a vessel in the small rectangle-shaped area of Monroe Harbor in Lake Michigan between 6:00 a.m. and 10:30 a.m. on August 23, 2026, unless the Captain of the Port (COTP) Lake Michigan or a designated representative authorizes entry. The rule lists the exact bounding coor…

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## Sources
- [2026-16341 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/11/2026-16341/safety-zone-lake-michigan-chicago-il)
- [2026-16341 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-11/pdf/2026-16341.pdf)

## Related
- [Previous: 2026-16337, Cancellation of Obsolete Navigation and Vessel Inspection Circular](https://policyrisk.com/federal-register/2026-16337)
- [Next: 2026-16354, Special Local Regulation; Great Lakes Annual Marine Events-Cuyahoga River, Clev…](https://policyrisk.com/federal-register/2026-16354)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-16341 (as of 2026-08-18).