Richmond Hill is one of the seven train lines in the GO transit system. This section is owned by Canadian National and is part of the transcontinental freight system. The VIA Rail transcontinental service between Vancouver and Toronto also uses this line, but it doesn't stop in Richmond Hill.

To the east of the rail line is Observatory Park. The Richmond Hill David Dunlap Observatory (RHDDO) houses the largest telescope in Canada. A number of important studies have taken place here, including providing the first direct evidence that Cygnus X-1 was a black hole, pioneering measurements of the distance to globular clusters and the discovery that Polaris was stabilizing.