Indian Rocks, Grande Ronde Valley June 25, 2020 Posted in Eastern Oregon, Union County Oregon Indian Rocks lie above the Grande Ronde Valley, about a half hour drive from La Grande. In late spring, it is a great place for a picnic or a bike ride. Indian Rocks Grande Ronde Valley, La Grande Indian Rocks Grande Ronde Valley, La Grande Indian Rocks Grande Ronde Valley, La Grande Indian Rocks Grande Ronde Valley, La Grande Indian Rocks Grande Ronde Valley, La Grande Indian Rocks Grande Ronde Valley, La Grande