The big difference is that cumulative is far more common than accumulative. At the level of actual meaning, to the extent that accumulative is used at all, it tends to refer to someone/something doing the accumulating. By contrast, cumulative is more associated with that which is accumulated.
Driving distance from Crescent City, CA to Eureka, CA. The total driving distance from Crescent City, CA to Eureka, CA is 84 miles or 135 kilometers. Your trip begins in Crescent City, California. It ends in Eureka, California.
If you choose to fly to Redwood National Park, the Arcata/Eureka Airport is the closer of the two airports within a one-hour drive of the park, sitting less than 25 miles from the western edge of the park. Though small, the airport has car rental agencies and two major airlines flying in and out on a regular basis.