With four days, and returning for nightly stays in a Eureka hotel, you will be busy with your itinerary.
Visiting the Lost Coast will be an all day affair as it is slow driving with lots of twists & curves. It is a beautiful drive along Mattole Road, starting in Ferndale, then along the coast and then through Humboldt Redwoods State Park, ending up back on 101 near Redcrest. Pack a lunch as snack shacks are few and far between after you leave Ferndale. You can drive further south along the Lost Coast, down to Shelter Cove, but it would be a VERY LONG DAY – too much driving time in too short a period of time.
Avenue of the Giants is impressive and one could easily spend the better part of a day in the area.
Ferndale is a quaint old Victorian style town that you could also easily spend a day at.
Old Town Eureka is good for a day’s touring also. A horse drawn carriage is available for hire for a guided tour of Old Town.
For a tour of Humboldt Bay, a boat tour on the Madaket is available, mooring on the east side of Humboldt Bay Marina. The Madaket boasts: Enjoy a beverage from the smallest licensed bar in the State of California while taking in the sights and sounds of the waterfront during this relaxing slow paced cruise. Humboldt Bay Harbor Cruise Motor Vessel MADAKET
Also check out 101 Things To Do In Humboldt 101 Things To Do Humboldt County | Your Guide to Activities, Entertainment, Dining, Lodging, and More
For dining:
Breakfast –
Chalet House of Omelettes in Eureka – never a disappointment.
Mexican –
La Costa in Fortuna. A hole in the wall, but probably Humboldt’s best Mex.
Burgers –
Surfside Burger Shack on 5th in Eureka, pricey but good
No Brand Burger Stand in Ferndale (on the way to the Lost Coast) a true hole in the wall shack, but good burgers.
Dinner –
Abbruzi’s in Arcata is very good, Italian food is the mainstay, but the menu is varied enough with beef & seafood to suit most.
Bear River Casino in Loleta isn’t bad for dinner and not too spendy. Check online for their latest offerings.
The Sunset Room at Cher Ae Casino in Trinidad has a good dinner offering, with a great view of the coast, though the acoustics aren’t good and it can get noisy.
Moonstone Grill for dinner between McKinleyville and Trinidad. It’s quiet, romantic and has a great view of the ocean surf.
One place I have been meaning to try is the AA Bar & Grill on 4th in Eureka. It doesn’t look too appealing from the outside, but it has been voted Humboldt’s best for steaks. All patrons I have spoken to have given it 2 thumbs up. It’s right across the street from the jail and courthouse, and popular with the “Legal Justice Crowd”.
Humboldt County has tons of restaurants, so there are plenty of eateries to roll the dice with. The ones I listed above I don’t hesitate to recommend. One I wouldn’t bother with is the Samoa Cookhouse (mediocre food) other than to view their collection of logging history artifacts.
You can check out most of Humboldt restaurants at North Coast Dining Guide
Well, that ought to keep you occupied for 4 days. The weather here on the coast in August is quite mild, rarely getting above the mid 70°s. Heading inland it warms up quick. Have fun!