| State: | SON |
| Type: | FH |
| Route: | 8 |
| Maint: | Board of Highways of the State of Sonora |
| Length Km: | 103.70 |
| Length Round: | 2 |
| Length Ref: | [1] |
| Direction A: | West |
| Terminus A: | Puerto Peñasco, Son. |
| Junction: | near Puerto Peñasco in Sonoyta in Sonoyta |
| Direction B: | East |
| Terminus B: | between Sonoyta and Lukeville, AZ |
| Previous Type: | FH |
| Previous Route: | 5 |
| Next Type: | FH |
| Next Route: | 9 |
Federal Highway 8 (es|'''Carretera Federal 8''', Fed. 8) is a free part of the federal highways corridors (es|los corredores carreteros federales) in Sonora. It is connected to the roadway that transitions from the border post at Lukeville, Arizona where it connects with Arizona State Route 85, proceeds south through Puerto Peñasco with Sonoyta, Sonora, and intersects with Fed. 2. It continues through the El Pinacate and Gran Desierto de Altar Biosphere Reserve until ending at Puerto Peñasco, a length of 100km (100miles).
| Municipality | Location[2] | km | mi | Roads intersected | Notes |
|---|---|---|---|---|---|
| Puerto Peñasco | Puerto Peñasco | 0km (00miles) | 1 de Junio | Western terminus | |
| 9.9km (06.2miles) | |||||
| Plutarco Elías Calles | Sonoyta | 100km (100miles) | Begin overlay of Fed. 2 | ||
| 101km (63miles) | End overlay of Fed. 2 | ||||
| 104km (65miles) | Eastern terminus at Mexico-U.S. border proceeding into Pima County, AZReferences |