Driving Directions Poniard Pharmaceuticals 300 Elliott Avenue West, Suite 500 Seattle, WA 98119 Driving directions From Interstate 5 (I5 North or I5 South) take the Mercer Street/Seattle Center exit (#167). Keep right at the fork in the ramp, and stay in the second right lane. At the signal, turn right onto Fairview Avenue North. Proceed a short distance to the next signal and turn left onto Valley Street, which becomes Broad Street. From Broad Street, turn right onto Denny Way. Denny Way takes a slight turn to the right and becomes Western Avenue, then at the signal at the bottom of the hill it becomes Elliott Avenue West. Just past the light at West Harrison Street (on the right) there is a small parking lot for Poniard visitors. Poniard Pharmaceuticals headquarters is located one block south, at 300 Elliott Avenue West, Suite 500. Click on the above map to get driving directions from your location