My list tends a little farther East.

Arizona
Manzanita 1/2 d Sprint (R)
Manzanita 1/3 d Sprint (R)

California
Fremont (Baylands) 3/8 D Sprint
Gardena (Ascot) 1/2 D Sprint
San Jose Fairground 1/4 D Sprint
San Jose Fairground 1/3 D Sprint (R)

Colorado
Denver 1/2 D Dirt (C)

Connecticut
Danbury 1/3 P Midget
New Haven Coliseum 1/6 P TQ
Stafford Springs 1/2 D Mod (C)

Florida
Auburndale 1/4 P Midget (A)
Hialeah 1/4 P Midget (A)
Hollywood 1/4 P SM
Jacksonville 1/2 D Sprint
Tampa (Fgnd) 1/2 D Dirt, Sprint (R)
Tampa (GldnGate) 1/3 P SM
Tampa (Plant Field) 1/2 D Sprint
West Palm Beach 1/2 P SM

Illinois
Hinsdale (Santa Fe) 3/8 D Sprint
Springfield (Little) 1/4 D Midget

Indiana
Boswell (Kamp) 1/4 D Sprint
Gas City 1/4 D

Massachusetts
Agawam (Rivers1de Park) 1/4 P Midget (C)
Dracut 1/4 P Midget
Groveland (Pines) 1/4 P Midget
Lakeville 1/2 D Midget (A), Sprint
Millers Falls 1/4 D Mod (C)
Norwood 1/4 P Midget
Westboro 1/4 P Midget (C,A)
West Peabody 1/4 P Midget
Westfield (Whip City) 1/4 D Midget

Michigan 1
Pontiac (Silverdome) 1/5 D Midget

New Hampshire
Brookline 1/4 P Midget
Canaan (Fair) 1/4 D Sprint, Mod
Claremont 1/4 D Mod (C)
Keene (Cheshire Fgnd) 1/3 D Mod (C)
Lee County 1/3 P Midget (A)
Loudon (Bryar Park) 1/3 P SM

New Jersey
Flemington 1/2 D Midget (C)
Teaneck (Armory) 1/9 P TQ
Trenton (Fgnd) 1 P Champ

New YOrk
Hamburg 1/2 D Sprint (C)
Owego 1/2 P Sprint (C)
Plattsburgh 1/2 P Midget (A)
Westhampton (Isnd Gdns) 1/9 P TQ

Ohio
Cleveland (Cloverleaf) 1/4 P Midget (C)
New Bremen 1/2 D Sprint (C)
S. Amherst (Lorain) 1/2 D Midget (C)

Oklahoma 2
Oklahoma City (Fgnd) 1/2 D Sprint

Pennsylvania
Bloomsburg (Fgnd) 1/2 D Midget (C)
Hatfield 1/3 D Midget
Langhorne 1 D Champ
Long Pond (Pocono) 3/4 P Midget (O)
Nazareth 1 D Dirt
Nazareth 1 P Dirt
Philadelphia (JFK Stdm) 1/4 P Midget
Reading (Fgnd) 1/2 D Sprint (C)
Silver Springs 1/2 D Sprint

Vermont
Essex Junction 1/2 D Midget (C)
Milton (Catamount) 1/3 P Midget (C)

Canada
Quebec (Modern) 1/3 P Sprint (C)
St. Pie (Sanair) 1/3 P Midget (A)

That's 62 Tracks.
R = Reported from
C = Crewed on car
A = Announced