| Country: | RUS |
| Type: | R |
| Route: | 258 |
| Alternate Name: | Baikal Highway |
| Map: | M55 karte RF.jpg |
| Length Km: | 1113 |
| Direction A: | West |
| Terminus A: | in Irkutsk |
| Direction B: | East |
| Terminus B: | in Chita |
The Baikal Highway is a federal highway in Russia. Its official designation is federal highway R258 "Baikal" (Russian: Федеральная автомобильная дорога Р258 «Байкал»). It is part of the Trans-Siberian Highway and of the AH6 route of the Asian Highway Network. It is named after the Russian Lake Baikal.
The road has 296 bridges and no tunnels. There are no toll segments on the highway.