When the section of Highway 1 east of Chilliwack opened in 1961, Highway 9 was extended south to a junction with the new Highway 1 alignment, which replaced Yale Road as the main route between Chilliwack and Hope.

After crossing the Fraser, Highway 9 travels north for 2.5 km (1.6 mi) to the centre of Agassiz.

Highway 9 then travels 6.4 km (4.0 mi) north to terminate at Harrison Hot Springs.

The entire route is in Fraser Valley Regional District.

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