The easiest access is from the end of Merrycreek Road which starts near 18th Street and Columbia Avenue. There's parking at the end of the pavement [N49 17.812 W117 39.608] or higher up at the end of a short, steep, rough road [N49 17.847 W117 39.791]. The trail starts near the upper parking.
Retrieving these caches can be a very pleasant long walk. It's also possible to reach all but one of the caches [RATR#06] by quad.
Alternate parking is in the Merry Creek Trails parking lot. One of the caches [RATR#06] is part way down the walking/biking trail to the plateau. The bottom part of the trail is fairly steep.