Between Pendleton and the Oregon-Idaho border, there are 4 state parks close to I-84.
Heading west to east, they are:
- Emigrant Springs State Heritage Area-just off the highway 25 miles past Pendleton, [only camping fees listed]
- Blue Mountain Forest State Scenic Corridor-just off the highway past Meacham, free
- Farewell Bend State Recreation Area-1 miles north of I-84, between Baker City & Ontario, $5 day use fee
- Ontario State Recreation Site-1 mile north of Ontario, free
You might also consider stopping near Baker City at the National Historic Oregon Trail Interpretive Center open 9-4 daily until December.