Course Atlas Support

Explore the bundled 2026 Chicago, Philadelphia and Toronto Waterfront marathon courses on Apple Maps, with estimated kilometre markers, available terrain profiles and optional nearby-course matching.

Contact and feedback

Email rossbain@mac.com for help or feedback. Include your device, iOS version, app version and steps to reproduce a problem. Beta testers can also send feedback through TestFlight. Avoid unnecessary personal or location information.

Read the Privacy Policy. Location permission can be changed in iOS Settings. Exploration works without location permission; map display requires available or cached Apple Maps data.

Use and limitations

Course Atlas is an independent course exploration app, not affiliated with or endorsed by race organizers or CTA. Routes and kilometre markers are approximate and are not intended for race-day navigation, exact splits or progress tracking. Terrain is not surveyed road-deck elevation; coverage varies and no total climb is claimed. Transit is approximate and does not include live service information. Consult race organizers and transit providers for current official information.

Source notices

Data provided by Chicago Transit Authority. Terrain sources: USGS and Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada. Contains information licensed under the Open Government Licence – Toronto.

Roadway reference: City of Philadelphia, Streets Department. Modified for Course Atlas; provided as is, without warranty.

This site provides applications using data that has been modified for use from its original source, www.cityofchicago.org, the official website of the City of Chicago. The City of Chicago makes no claims as to the content, accuracy, timeliness, or completeness of any of the data provided at this site. The data provided at this site is subject to change at any time. It is understood that the data provided at this site is being used at one’s own risk.

Course notes in the app contains additional source, licence and accuracy information. Apple Maps attribution and legal information appear on the map.