| Istrian Spring Trophy | |
| Date: | Mid-March |
| Region: | Istria |
| Localnames: | Istarsko proljeće |
| Discipline: | Road race |
| Competition: | UCI Europe Tour |
| Type: | Stage race |
| Number: | 63 (as of 2024) |
| Mostwins: | (4 wins) |
Istrian Spring Trophy (hr|Istarsko proljeće) is a stage road bicycle race held annually in the Croatian part of the Istria peninsula. The race was first organized in 1961 as a small competition reserved to local cyclists. In 2000, it was opened to professional riders; since 2005, it is rated as a 2.2 event on the UCI Europe Tour. Before 2006, the race was called "Jadranska magistrala".
The 2012 edition of the race featured a prologue and three stages totaling, and was contested by more than 200 cyclists from 35 teams.[1]