Go left at the bottom of the off ramp onto E. Marine View Dr.
Follow road until it goes under the overpass of Hwy 529 going north; road you are on becomes Hwy 529S (this road is also called W. Marine View Dr on some maps)
Go past the Legion Park golf course entrance; take the next left onto Alverson Blvd.
Take the next left into Legion Park and turn right at the parking lot. Entrance to the arboretum is at the far end of the parking lot.
Southbound on I-5
Take exit 198 onto southbound Hwy 529
Follow Hwy 529 across the Snohomish River Delta bridge
Take right at the first exit after bridge to Hwy 529S
Bottom of the ramp at light turn left onto Hwy 529S (on some maps this road is also called W. Marine View Dr)
Go past the Legion Park golf course entrance; take the next left onto Alverson Blvd.
Take the next left into Legion Park and turn right at the parking lot. Entrance to the arboretum is at the far end of the parking lot.