Very quickly, here's all of the stations I got on FM from the Hampton Inn Gresham, OR.
88.1 KQOC Gleneden Beach, OR/KWAO Ocean Park, WA
88.3 KBVM Portland
88.5 KPLU Tacoma
88.7 KLVP Portland
88.9
89.1 KMHD Gresham
89.3
89.5 KPFR Portland
89.7
89.9 KQAC Portland
90.1
90.3 KZRI Welches, OR
90.5
90.7 KBOO Portland
90.9
91.1 KTJC Kelso, WA
91.3
91.5 KOPB Portland, OR
91.7
91.9 CSN xlator, Portland
92.1
92.3 KGON Portland
92.5
92.7 K224DL Portland (KZRI)
92.9 KISM Bellingham, WA on Saturday night. 200 mile Tropo!
93.1 KRYP Portland
93.3 KKNU Springfield/KUBE Seattle, WA
93.5 K228EU Portland
93.7
93.9 KPDQ Portland
94.1 KMPS Seattle
94.3 KZZR Government Camp
94.5 likely KLYK Kelso u/ KNRK IBOC
94.7 KNRK Portland
94.9 KUOW Seattle
95.1 KSND Monmouth
95.3
95.5 KBFF Portland
95.7 KJR Seattle
95.9 K240CZ Portland (KLVP)
96.n1 KXXO Olympia (didn't pull in KZEL this time around, did last time in September 2011)
96.3 K242AF Portland (KLVP)
96.5 KWLZ Warm Springs, OR/KJAQ Seattle
96.7
96.9
97.1 KYCH Portland
97.3 KIRO Tacoma (weak with CBS News u/ KYCH IBOC)
97.5 no id stn Saturday night, likely KNLR or KSHL
97.7 KOMO Oakville
97.9 KNRQ Eugene
98.1 KING Seattle
98.3 KPPK Rainier, OR
98.5
98.7 KUPL Portland (I find it interesting that some of the music is sped DOWN, and not up)
98.9 KLCK Seattle
99.1
99.3
99.5 KWJJ Portland
99.7
99.9 KRKT Albany, OR
100.1
100.3 KKRZ Portland
100.5
100.7 KKWF Seattle
100.9
101.1 KXL Portland
101.3
101.5 KFLY Eugene
101.7
101.9 KINK Portland
102.1
102.3 K272EL Portland (KEX)
102.5 CSN xlator Elwood, OR/KZOK Seattle
102.7 K274AR Gresham (KZRI)
102.9 KNBQ Centralia
103.1
103.3 KKCW Beaverton
103.5
103.7 KMTT Seattle
103.9
104.1 KFIS Portland
104.3 KMNT Centralia
104.5 Way FM xlator Portland
104.7 KDUK Florence
104.9
105.1 KRSK Molalla
105.3
105.5 CSN xlator somewhere/KUKN Longview
105.7
105.9 KFBW Vancouver
106.1
106.3 KLOO Corvallis
106.5
106.7 KLTH Portland
106.9
107.1 K296FT Portland/KRQT Castle Rock (fighting with each other)
107.3
107.5 KXJM Banks
107.7
107.9 KHPE Albany
-crainbebo