Fresh water moorage on Lake Union with convenient access to the Ballard Locks, Lake Washington & the Puget Sound Welcome to Thunderbird Marina Perfectly situated at the north end of Lake Union near restaurants and parks with easy access to the Ballard Locks Covered MoorageDock UpgradesDock BoxesUncovered MoorageWhat We OfferThunderbird Marina has been serving the Seattle boating community for 4 generations 60 slips of combined covered and uncovered moorageFirst come, first served parking for Marina tenantsFreeway access to I-5, SR520 and I-9030 & 50 Amp metered shore power to slipsMinutes away from great restaurants and parksSeveral waterfront commercial offices for leaseEmail us