Riga City Council mayor Nils Ušakovs said the marathon "has already become part of the lifestyle of our city" and contributes millions of euros to the local economy.
This year's events, which form the 19th iteration of the city marathon, will spread over two days on May 19 and 20 with 35,000 participants expected from 70 different countries.
For the first time, runners will cross the Daugava by three bridges - first by the usual Vanšu bridge, but a little later along the Akmens and Salu bridges.
A certain amount of traffic problems might be caused by road closures and other restrictions, but Ušakovs called on city residents to enter into the spirit of the special event.
There will also be a 4.2 km long Family Race, chosen as one tenth of the full marathon distance, plus races over 6 km, 10 km, half-marathon and full marathon distances.
Organizers also revealed the official race jersey, based on a design by Latvian Constructivist artist Gustavs Klucis.
Lattelecom @RigasMaratons oficiālo kreklu šogad rotās Gustava Kluča (1895–1938), Latvijas visu laiku slavenākā mākslinieka, zīmējums “Daugavas sargs”, kurā attēlots Lāčplēsis ? #LattlecomRigaMarathon pic.twitter.com/44JfQyLGU4— Lattelecom Riga Marathon (@RigasMaratons) March 7, 2018
You can find more information and register for the race at the official website HERE.