| Country: | ISR |
| Type: | Route |
| Route: | 866 |
| Length Km: | 11.4 |
| Established: | 1932 |
| Direction A: | South |
| Terminus A: | Hananya Junction |
| Direction B: | North |
| Terminus B: | Meron Junction |
| Previous Route: | 864 |
| Previous Type: | Route |
| Next Route: | 869 |
| Next Type: | Route |
Route 866 is a north-south regional highway in northern Israel. It begins at Hananya junction with Highway 85 in the south and ends at Meron junction with Highway 89 in the north.
The road was paved in the early 1930s[1] to connect Highway 85 to Highway 89 and thus create the Acre-Safed road. In Safed, Highway 89 connected to the Rosh Pinna-Safed road, which was already paved during the First World War, and ended at the intersection with Highway 90 in Rosh Pinna. The construction of this section helped the link between Safed and Haifa, following the shortening of the travel route that previously passed through Tiberias, or by camel caravans on a narrow lane.
In the early 1950s, there were two shooting attacks on the road in the section of the road near Miron, in which 3 people were killed and others were injured.[2] [3]
In the 1950s, the settlements of Parod, Shefer and Amirim were established on the side of the road.