In most cases. Limits can vary, so watch it. Don't blame me if you get a ticket.
Speed limits shown are based on the WADOT highway log. 
The indications are the approximate location where you can expect a speed change!

Table data based on Washington DOT's State Route Web photo logs.
For the most part, it reflects the signage on the photos, which may have changed since the log was done, and should be only construed as a general guide to junctions on this freeway. Mileage for other features is based on the Washington State Highway log.

For an alternate take on all this, have a look at this page

The Ocean is the Ultimate Solution. Really.

Washington EXIT  NUMBER(milepost)
Washington State highway , Street Name  or EXIT Destination		Other Features
NORTH scroll down	SOUTH click here
Washington EXIT1A
EAST  Camas
	RIGHT LANE EXIT ONLY
Washington mile 0.46
Washington EXIT 1B
(Vancouver) City Center 6th Street
Washington EXIT 1C
Mill Plains Boulevard	Mill Plains Boulevard Civic Center	Fort Vancouver  National Historic Site
		Clark College
	RIGHT LANE EXIT ONLY	Clark County  Historical Museum
Washington EXIT 1D
4th Plain Boulevard	4th Plain Boulevard Port of Vancouver	Vancouver  Lake
RIGHT LANE EXIT ONLY
Washington EXIT 2
Orchards
39th Street
RIGHT LANE EXIT ONLY
Washington EXIT 3
Hazel Dell NE HWY 99	Main Street
Washington EXIT 4
NE 78th Street
Washington EXIT 5
NW 99th Street
Washington EXIT 7
NE 134th Street	SOUTH  TO  East Portland Freeway  Salem
	NE 134th Street USE  SOUTH to  JN 36
Washington EXIT 9
EAST  NE 179th Street  Battle Ground	NE 179th Street	Battle Ground  Lake  State Park
Washington mile 9.51
Washington mile 11.33
Washington EXIT 14
WEST Pioneer Street Ridgefield
Washington mile 15.45
Washington EXIT 16
NW La Center Road La Center		Paradise Point  State Park
Washington mile 20.78
Washington EXIT 21
EAST  Woodland  Cougar		Lake Merwin
		Mount Saint Helens  National  Volcanic Monument
Washington EXIT 22
Dike Access Road
Washington EXIT 27
Todd Road  Port of Kalama
Washington EXIT 30
Kalama
Washington EXIT 32
Kalama River Road
Washington EXIT 36
WEST  TO Long Beach Peninsula	WEST  TO   Kelso-Longview Industrial Areas
Kelso Road Carrolls	Carrolls
RIGHT LANE EXIT ONLY
Washington EXIT 39
WEST   Kelso  Longview	WEST   Kelso	Cowlitz County  Historical Museum
		Lower Columbia  College
	RIGHT LANE EXIT ONLY
Washington EXIT 40
North Kelso Avenue	SOUTH  TO Kelso-Longview Long Beach
RIGHT LANE EXIT ONLY
Washington EXIT 42
Ostrander Road Pleasant Hill Road	Ostrander Road
Washington mile 44.08
Washington EXIT 46
Headquarters Road	Headquarters Road Pleasant Hill Road
Washington EXIT 48
Castle Rock	Huntington Avenue
Washington EXIT 49
SOUTH   EAST Castle Rock Toutle		Seaquest State Park
		Mount Saint Helens  National  Volcanic Monument
Washington EXIT 52
Barnes Drive Toutle Park Road	Toutle Park Road
Washington mile 54.57
Washington EXIT 57
Jackson Highway	Jackson Highway Barnes Drive
Washington mile 57.13(inside JN 57)
Washington EXIT 59
WEST Vader Ryderwood
Washington EXIT 60
Toledo-Vader Road
RIGHT LANE EXIT ONLY
Washington EXIT 63
Winlock Toledo		Mount Saint Helens  National  Volcanic Monument
Washington EXIT 68
EAST  Morton  Yakima		Ike Kinswa State Park
	RIGHT LANE EXIT ONLY
Joins	Leaves
Washington EXIT 71
Napavine Onalaska
Washington EXIT 72
Rush Road
Washington EXIT 76
13th Street
Washington EXIT 77
WEST  Pe Ell  Raymond		Rainbow Falls State Park
Washington EXIT 79
Chamber Way		Lewis County  Historical Museum
Washington EXIT 81
NORTH Mellen Street		Centralia College
Washington EXIT 82
Harrison Avenue
Washington mile 85.51
Washington JUNCTION 88
EXIT 88A	EXIT 88	Fort Henness  Monument
Tenino	WEST  Aberdeen Tenino
EXIT 88 B
WEST  Aberdeen
Leaves	Joins
Washington mile 90.8
Washington mile 93.43
Washington EXIT 95
NORTH  Littlerock  Maytown		Millersvania  State Park
Washington EXIT 99
93rd Avenue Scott Lake		Millersvania  State Park
Washington mile 100.52
Washington EXIT 101
Airdustrial Way
Olympia Airport
Washington EXIT 102
Trosper Road  Black Lake
Washington EXIT 103
Deschutes Way	2 nd Avenue	Tumwater  Historical  Park
Washington EXIT 104
NORTH  Aberdeen  Port Angeles		South Puget Sound  Community College
	RIGHT LANE EXIT ONLY
Washington EXIT 105
State Capitol (Olympia) City Center Port of Olympia		Washington  State  Capitol
	RIGHT LANE EXIT ONLY
Washington EXIT 107
Pacific Avenue
Washington EXIT 108
Sleater-Kinney Road  College Street	Sleater-Kinney Road South
RIGHT LANE EXIT ONLY
NO return to NORTH
Washington EXIT 109
Martin Way	Sleater-Kinney Road North
Washington EXIT 111
EAST Yelm Marvin Road		Mount Rainier  National  Park
Washington EXIT 114
Nisqually  Old Nisqually	Nisqually
Washington mile 114.93
Washington EXIT 116
Mounts Road
Washington mile 117.51
Washington EXIT 118
Center Drive
Washington EXIT 119
Steliacoom Dupont Road
RIGHT LANE EXIT ONLY
Washington EXIT 120
Fort Lewis North Fort Lewis
Washington EXIT 122
Madigan Hospital Camp Murray
Washington EXIT 123
Thorne Lane
	RIGHT LANE EXIT ONLY
Washington EXIT 124
Gravelly Lake Drive
Washington EXIT 125
Bridgeport Way McChord AFB		Steilacoom Tribal Museum
		National Historic  District
		Fort Steilacoom
Washington EXIT 127
EAST  Puyallup  Mount Rainier	EAST Puyallup South Tacoma Way	Mount  Rainier  National Park
	RIGHT LANE EXIT ONLY	Western  Washington  Fairgrounds
Washington EXIT 128
South 84th Street
Washington EXIT 129
South 72nd Street	South 72nd Street South 84th Street
	RIGHT LANE EXIT ONLY
Washington EXIT 130
South 56th Street  Tacoma Mall Boulevard	South 56th Street
RIGHT LANE EXIT ONLY
Washington EXIT 132
South 38th Street
NORTH   Gig Harbor  Bremerton
RIGHT LANE EXIT ONLY	2 RIGHT LANES EXIT ONLY
Washington EXIT 133
NORTH  SOUTH   (Tacoma) City Center Pacific Avenue		Mount  Rainier  National Park USE SOUTH
2 RIGHT LANES EXIT ONLY	RIGHT LANE EXIT ONLY
	SLOW MOVING VEHICLES NEXT 1½ MILES
Washington EXIT 134
Portland Avenue		Tacoma  Dome
Washington EXIT 135
SOUTH  Puyallup	SOUTH  Puyallup	Tacoma  Dome
	Portland Avenue
Washington JUNCTION 136
EXIT 136A	EXIT 136	Port of Tacoma
20th Street East	Port of Tacoma
EXIT 136B
Port of Tacoma
Washington EXIT 137
NORTH Fife Milton
Washington mile 139.5
Washington mile 140.27
Washington mile 140.81
Washington EXIT 142A
EAST  Auburn  North Bend
For  EAST  USE    to North Bend
Washington EXIT 142B
TO    Federal Way	SOUTH Puyallup
Washington EXIT 143
Federal Way  South 320th Street		Dash Point State Park
	RIGHT LANE EXIT ONLY
Washington EXIT 147
South 272nd Street
Washington JUNCTION 149
EXIT 149A	EXIT 149	Highline  Community  College  WEST
EAST  Kent	Des Moines Kent RIGHT LANE EXIT ONLY
EXIT 149B		Saltwater  State Park WEST
WEST  Des Moines
Washington EXIT 151
South 200th Street Military Road
Washington EXIT 152
South 188th Street Orilla Road South		Sea-Tac  International Airport
Washington EXIT 154A
Southcenter Parkway and Mall
Washington EXIT 154B
NORTH   Renton TO	WEST  Burien   Sea-Tac Airport
RIGHT LANE EXIT ONLY	Southcenter Blvd
	RIGHT LANE EXIT ONLY
Washington EXIT 154A
WEST  Burien   Sea-Tac International Airport	NORTH  Renton  Bellvue LEFTLANE EXIT ONLY
NORTH Scroll Down	SOUTH Scroll Up
Washington EXIT 156
NORTH   Tukwila West Marginal Way	Tukwila Interurban Avenue
Washington EXIT 157
Martin Luther King Way	EAST Martin Luther King Way
Washington EXIT 158
Airport Way East Marginal Way	Pacific Highway South East Marginal Way	Boeing Field
RIGHT LANE EXIT ONLY		Museum of Flight
Washington EXIT 161
Swift Avenue  Albro Place
Washington EXIT 162
Corson Ave  Michigan Street
LEFT EXIT	RIGHT LANE EXIT ONLY
Washington JUNCTION 163
EXIT 163	EXIT 163A
West Seattle Freeway