Where can I book seat reservations to go with a Eurail pass?

A Eurail Global Pass offers free travel for a certain number of days, but doesn't include seat reservations. Seat reservations can be made on raileurope.com (and their regional sister sites for Australia, Canada, and the rest of the world), but they charge a significant fee (can be around €10, often more than the reservation itself!) and can usually only send the reservation by mail, which is tricky if you're already travelling.

Where can I reserve seats to go with a Eurail pass, without the extra expense and inconvenience of booking through Rail Europe?

Best Answer

As ever for European train travel, The Man in Seat 61 is a good resource, specifically his guide to Eurail passes. He lists three options for making reservations without paying the Rail Europe fee:

In person at the station, at the ticket counter or (in some countries) at an automated ticket machine.
Using the Eurail Rail Planner App.
Using the website of whichever national train operator is running the service. Details of how to do this differ between countries, and listing them all would make this answer enormous, but the linked Seat61 page has plenty of information and links organized by country. (Even without this guide, you can probably figure it out yourself after some digging around on the appropriate train operator site, but some are more user-friendly than others :) ).