Hiked up Eureka from Black Rock Canyon Campground via the California Riding and Hiking Trail, Fault Trail and the Eureka Peak Trail. Returned via the Burnt Hill Trail to the Black Rock Canyon Trail and then hiked up Warren on the same trip. It took me about 5 1/2 hr. for both from the Back country board at the Campgrounds.
I didn't notice the road until I was almost on the summit. The trails/washes are less-than-well-signed, but it's pretty clear where the high point lies.