The boat ramp named 3rd Avenue Fi 100-176 in Fox Island, Washington is a public boat ramp managed by Pierce County Parks and Recreation. It is a concrete double-lane boat ramp that is approximately 24 feet wide and has a moderate slope. The boat ramp provides access to the waters of Hale Passage, which is part of the Puget Sound.

The boat ramp is suitable for launching various watercraft such as powerboats, sailboats, kayaks, and canoes. However, it should be noted that the ramp is primarily intended for small to medium-sized boats, and larger craft may have difficulty launching and retrieving.

According to the latest information available, the boat ramp is open year-round and requires a launch fee. Additionally, the parking lot near the boat ramp has a capacity of 31 vehicles and 18 trailers. Overall, the 3rd Avenue Fi boat ramp provides convenient and accessible access to the waters of the Puget Sound for recreational boaters in the area.