DTM
https://en.wikipedia.org/wiki/2018_Deutsche_Tourenwagen_Masters
http://www.dtm.com/en/
https://twitter.com/DTM
https://www.instagram.com/DTM_Pics
http://www.dtm.com/en/dtmtv
06 May - Hockenheimring, GERMANY
20 May - Lausitzring, GERMANY
03 Jun - Hungaroring, HUNGARY
24 Jun - Norisring, GERMANY
15 Jul - Zandvoort, NETHERLANDS
11/12 Aug - Brands HATCH, UK
26 Aug - Misano, ITALY
09 Sep - Nurburgring, GERMANY
23 Sep - Spielberg, AUSTRIA
14 Oct - Hockenheimring, GERMANY
World Touring Car Cup
Related Forza cars: Forza Touring Cars division.
https://en.wikipedia.org/wiki/2018_World_Touring_Car_Cup
http://www.fiawtcc.com
https://twitter.com/FIA_WTCC #WTCC
https://www.youtube.com/user/TheFIAWTCC
https://instagram.com/fia_wtcc
Sport news, live streaming & results - Eurosport
http://www.cbssportsnetwork.com/schedule/cbssn
This is the first of a new series replacing the World Touring Car Championship, which ended with 2017. The Cup uses TCR regulations instead of TC1 regulations; basically privateers instead of manufacturer teams.
08 Apr - Moulay El Hassan, MOROCCO
29 Apr - Hungaroring, HUNGARY
13 May - Nurburgring, GERMANY
21 May - Zandvoort, NETHERLANDS
24 Jun - Vila Real, PORTUGAL
05 Aug - Termas de Rio Hondo, ARGENTINA
30 Sep - Ningbo, CHINA
21 Oct - Suzuka, JAPAN
18 Nov - Guia Circuit, MACAU
TCR Europe Series
https://en.wikipedia.org/wiki/2018_TCR_Europe_Series
http://europe.tcr-series.com/
https://twitter.com/TCR_Series #TCR
https://www.youtube.com/channel/UCoSlmLSprEnTz7HjmMb7HBw
06 May - Le Castellet, FRANCE
21 May - Zandvoort, NETHERLANDS
10 Jun - Spa, BELGIUM
08 Jul - Hungaroring, HUNGARY
19 Aug - Assen, NETHERLANDS
23 Sep - Monza, ITALY
21 Oct - Barcelona-Catalunya, SPAIN
Scandanavian Touring Car Championship
https://en.wikipedia.org/wiki/2018_TCR_Scandinavia_Touring_Car_Championship
05 May - Knutstorp
17 Jun - Anderstorp
08 Jul - Falkenberg
19 Aug - Karlskoga
09 Sep - Rudskogen
22 Sep - Mantorp Park
British Touring Car Championship
Related Forza cars: Forza Touring Cars division.
https://en.wikipedia.org/wiki/2018_British_Touring_Car_Championship
https://twitter.com/DunlopBTCC
https://www.youtube.com/user/btccdotnet
https://instagram.com/officialbtcc
27 Mar - Donington Park
08 Apr - Brands Hatch Indy
29 Apr - Donington Park
20 May - Thruxton
10 Jun - Oulton Park
24 Jun - Croft
29 Jul - Snetterton
12 Aug - Rockingham
26 Aug - Knockhill
16 Sep - Silverstone
30 Sep - Brands Hatch GP
World Rally Championship
Example cars: Citroen C3, Hyundai i20, Ford Fiesta RS, Toyota Yaris
https://en.wikipedia.org/wiki/2018_World_Rally_Championship
https://twitter.com/OfficialWRC #WRC
https://www.youtube.com/user/wrc
http://www.foxsports.com/tv-listings
http://www.mavtv.com
25-28 Jan - Monte Carlo
15-18 Feb - Sweden
08-11 Mar - Mexico
05-08 Apr - Tour de Course
26-29 Apr - Argentina
17-20 May - Portugal
07-10 Jun - Sardegna
26-29 Jul - Finland
16-19 Aug - Germany
13-16 Sep - Turkey
04-07 Oct - Wales
25-28 Oct - Spain
15-18 Nov - Australia
FIA World Rallycross
Example Forza cars: 2016 Subaru #199 WRX STI VT15R Rally Car (FM7)
https://en.wikipedia.org/wiki/2018_FIA_World_Rallycross_Championship
https://twitter.com/FIAWorldRX/status/661556440461500416
http://www.fiaworldrallycross.com
https://twitter.com/FIAWorldRX
https://www.youtube.com/user/RallycrossRXTV
14-16 Apr - Spain
28-29 Apr - Portugal
12-13 May - Belgium
25-27 May - Great Britain
09-10 Jun - Norway
30-01 Jul - Sweden
04-05 Aug - Canada
01-02 Sep - France
15-16 Sep - Latvia
29-30 Sep - COTA, United States
13-14 Oct - Germany
24-25 Nov - South Africa
Red Bull Global RallyCross
Related Forza cars: 2014 Volkswagen Beetle GRC (FM7)
https://en.wikipedia.org/wiki/Global_Rallycross
http://redbullglobalrallycross.com
https://twitter.com/RedBullGRC
http://livetiming.net/grc
www.youtube.com/RedBullGRC
https://instagram.com/RedBullGRC
Schedule TBA. The season typically begins in April
EDIT:
Ugly Lawsuit With Subaru Documents The Implosion Of Red Bull Global Rallycross
Stef Schrader
4/17/18 4:24pm
https://jalopnik.com/ugly-lawsuit-documents-the-implosion-of-red-bull-global-1825327602
http://redbullglobalrallycross.com is now offline.
Formula D
https://en.wikipedia.org/wiki/Formula_D
formulad.com/schedule
formulad.jp/fd_schedule.html
twitter.com/FormulaDrift
formulad.com/live
youtube.com/Formuladrift
instagram.com/formulad
dailymotion.com/driftstream
06-07 Apr - Long Beach, California
13-14 Apr - Long Beach, California
27-28 Apr - Orlando Speedway, Florida
11-12 May - Road Atlanta, Georgia
01-02 Jun - Wall Stadium Speedway, New Jersey
20-21 Jul - Evergreen Speedway, Washington
10-11 Aug - Gateway Motorsports Park, Missouri
13-15 Sep - Texas Motor Speedway, Texas
12-13 Oct - Las Vegas Motor Speedway, Nevada
National Hot Rod Association drag racing
https://en.wikipedia.org/wiki/NHRA_Mello_Yello_Drag_Racing_Series
https://twitter.com/nhra
https://www.instagram.com/nhra
http://www.foxsports.com/tv-listings
http://www.nhraallaccess.com
11 Feb - Auto Club Raceway, California
25 Feb - Wild Horse Pass Motorsports Park, Arizona
18 Mar - Gainesville Raceway, Florida
08 Apr - Las Vegas Motor Speedway, Nevada
22 Apr - Royal Purple Raceway, Texas
29 Apr - zMAX Dragway, North Carolina
06 May - Atlanta Dragway, Georgia
20 May - Heartland Motorsports Park, Kansas
03 Jun - Route 66 Raceway, Illinois
10 Jun - Old Bridge Township Raceway Park, New Jersey
17 Jun - Bristol Dragway, Tennessee
24 Jun - Summit Racing Equipment Motorsports Park, Ohio
08 Jul - New England Dragway, New Hampshire
22 Jul - Bandimere Speedway, Colorado
29 Jul - Sonoma Raceway, California
05 Aug - Pacific Raceways, Washington
19 Aug - Brainerd International Raceway, Minnesota
03 Sep - Lucas Oil Raceway, Indiana
16 Sep - Maple Grove Raceway, Pennsylvania
23 Sep - Gateway Motorsports Park, Illinois
07 Oct - Texas Motorplex, Texas
14 Oct - zMAX Dragway, North Carolina
28 Oct - Las Vegas Motor Speedway, Nevada
11 Nov - Auto Club Raceway, California
Trans Am
https://en.wikipedia.org/wiki/Trans-Am_Series
02-04 Mar - Sebring, Florida
29-31 Mar - Road Atlanta, Georgia
13-15 Apr - Homestead-Miami Speedway, Florida
01-03 Jun - Detroit Grand Prix, Michigan
15-17 Jun - Indianapolis Motor Speedway, Indiana
03-05 Aug - Pittsburgh International Race Complex, Pennsylvania
09-11 Aug - Mid-Ohio
23-25 Aug - Road America, Wisconsin
07-09 Sep - Watkins Glen International, New York
21 Sep - VIR
01-03 Nov - COTA, Texas
09-11 Nov - Daytona International Speedway, Florida
FIA Global Pathway
Formula 2
European Formula 3 Championship
https://en.wikipedia.org/wiki/2017_European_Formula_3_Championship
http://www.fiaf3europe.com
https://twitter.com/fiaf3europe
https://www.youtube.com/user/FIAF3EUROPE
12-13 May - Pau, FRANCE
02-03 Jun - Hungaroring, HUNGARY
23-24 Jun - Norisring, GERMANY
14-15 Jul - Zandvoort, NETHERLANDS
27-28 Jul - Spa, BELGIUM
18-19 Aug - Silverstone, UNITED KINGDOM
25-26 Aug - Misano, ITALY
08-09 Sep - Nurburgring, GERMANY
22-23 Sep - Red Bull Ring, AUSTRIA
13-14 Oct - Hockenheimring, GERMANY
F4 United States Championship
https://twitter.com/SCCAOfficial
27-29 Apr - VIR
10-12 May - Road Atlanta
28 Jun -1 Jul - Mid-Ohio
03-05 Aug Pittsburgh International Race Complex
14-15 Sep - New Jersey Motorsports Park
19-21 Oct - COTA
Indy Lights (Road to Indy step 3)
Related Forza cars: 2013 Infiniti #77 Schmidt Peterson Motorsports Dallar IPS Indy Lights (FM5)
https://en.wikipedia.org/wiki/Indy_Lights
https://twitter.com/IndyLights
https://www.youtube.com/channel/UCSihlA2prskLkYQkHpfrxmA
Pro Mazda Championship (Road to Indy step 2)
Related Forza cars: 2015 Mazda Formula Mazda (FM7)
https://en.wikipedia.org/wiki/Pro_Mazda_Championship
http://promazdachampionship.com
https://twitter.com/promazda
http://www.ustream.tv/MazdaLive
https://www.youtube.com/user/StarMazdaChamp
USF2000 Championship (Road to Indy step 1)
Related Forza cars: 2013 Formula Ford EcoBoost 200 (FM7/FM6/FM5)
https://en.wikipedia.org/wiki/U.S._F2000_National_Championship
https://en.wikipedia.org/wiki/Formula_Ford
https://twitter.com/USF2000
https://www.youtube.com/user/USF2000Series
09-11 Mar - Streets of St. Petersburg
20-22 Apr - Barber Motorsports Park
10-12 May - Indianapolis Grand Prix Circuit
25 May - Indianapolis Motor Speedway
22-24 Jun - Road America
07-08 Jul - Iowa Speedway
13-15 Jul - Streets of Toronto
27-29 Jul - Mid-Ohio
24-25 Aug - Gateway Motorsports Park
31 Aug-02 Sep - Portland International Raceway
Mazda Prototype Challenge (IMSA)
https://en.wikipedia.org/wiki/Mazda_Prototype_Lites
https://prototypechallenge.imsa.com/schedule-results/race-schedule
https://twitter.com/IMSA #IMSAPC
http://imsatv.imsa.com
http://player.radiolemans.co/
http://www.radiolemans.com
https://twitter.com/radiolemans
https://twitter.com/IMSAradio
06 Jan - Roar Before the Rolex 24, Daytona Florida #Roar24
14-17 Mar - Sebring, Florida
19-22 Apr - Barber Motorsports Park, Alabama
06-08 Jul - Canadian Tire Motorsport Park, Ontario
17-19 Aug - VIR, Virginia
10-13 Oct - Road Atlanta, Georgia
Porsche GT3 Cup Challenge USA / Canada (IMSA)
https://en.wikipedia.org/wiki/IMSA_GT3_Cup_Challenge
https://twitter.com/IMSA #GT3USA and #GT3CAN
http://porschegt3cupusa.imsa.com
http://porschegt3cupcanada.imsa.com
http://imsatv.imsa.com
http://www.radiolemans.com
14-17 Mar - Sebring International Raceway, Florida
19-22 Apr - Barber Motorsport Park, Alabama
04-06 May - Mid-Ohio, Ohio
19-20 May - Canadian Tire Motorsport Park, Ontario
09-10 Jun - Circuit Gilles Villeneuve, Quebec
28Jun-1Jul - Watkins Glen International, New York
13-15 Jul - Streets of Toronto, Ontario
03-05 Aug - Road America, Wisconsin
10-12 Aug - Trois-Rivieres, Quebec
17-19 Aug - VIR, Virginia
25-26 Aug - Canadian Tire Motorsport Park, Ontario
14-16 Sep - Sonoma, California
10-13 Oct - Road Atlanta, Georgia
Porsche GT3 Cup Challenge Middle East
https://twitter.com/PorscheGT3CCME #GT3CCME #GT3Cup
http://www.porsche.com/middle-east/motorsportandevents/motorsport/customerracing/porschecups/gt3cupchallenge-me/features/racecalendar/
11-12 Nov 2017 - Bahrain International Circuit
16-18 Nov 2017 - Bahrain International Circuit
08-09 Dec 2017 - Dubai Autodrome
26-27 Jan 2018 - Dubai Autodrome
02-03 Feb 2018 - Yas Marina Circuit
16-17 Mar 2018 - Bahrain International Circuit
13-15 Apr 2018 - Bahrain International Circuit
Porsche Supercup (F1 support series)
https://en.wikipedia.org/wiki/Porsche_Supercup
https://twitter.com/PorscheSupercup
https://twitter.com/PorscheRaces
https://www.racecam.de
https://www.youtube.com/user/Porsche
https://www.instagram.com/porsche
Schedule TBA. The F1 season begins in Australia on March 23.
Ferrari Challenge
https://en.wikipedia.org/wiki/Ferrari_Challenge
https://twitter.com/FerrariRaces (Europe, Asia, and North America)
http://www.imsa.com/
https://twitter.com/IMSA
http://imsatv.imsa.com
http://www.radiolemans.com
https://www.youtube.com/user/ferrariworld
Schedule TBA.
Lamborghini Super Trofeo
Related Forza cars: 2015 Lamborghini #63 Squadra Corse Huracan LP620-2 Super Trofeo (FM7)
Heavy Metal Affliction: 2016 Lamborghini LP 620-2 ST
https://en.wikipedia.org/wiki/Lamborghini_Super_Trofeo
https://twitter.com/LamborghiniSC
http://squadracorse.lamborghini.com/super-trofeo
http://squadracorse.lamborghini.com/live-streaming
https://www.youtube.com/user/TheSuperTrofeo
Schedule TBA. The season typically starts in April.
Lamborghini GT3 / GTD
Change Racing – Lamborghini Huracán GT3 #16
Maserati Trofeo
Related Forza cars: 2014 Maserati #35 M.Calamia Swiss Team MC Trofeo (FM6 and FM7 - Forza GT division.)
https://en.wikipedia.org/wiki/Trofeo_Maserati
http://www.maseraticorse.com
https://twitter.com/MaseratiCorse
https://www.youtube.com/user/maserati
https://www.instagram.com/maserati
This one-make series seems to have ended in 2015 with the cars continuing to race in the Pirelli World Challenge and GT4 Europe series.
Global MX-5 Cup
https://www.mx-5cup.com
https://twitter.com/GlobalMX5Cup
23-25 Mar - COTA, Texas
20-22 Apr - Barber Motorsport Park, Alabama
22-24 Jun - Road America, Wisconsin
27-29 Jul - Mid-Ohio, Ohio
31Aug-02Sep - Portland International Raceway, Oregon
28-29 Sep - Monticello Motor Club, New York
Audi R8 LMS Cup
www.audi-motorsport-asia.com/en
03-04 Mar - Adelaide 500
11-12 May - Nurburgring 24 hours
01-02 Sep - Ningbo International Speedway
05-06 Oct - Shanghai Audi International Circuit
07 Oct - Shanghai Audi International Circuit
24-25 Nov - Sepang International Circuit
SEAT Leon Eurocup
GT Masters (ADAC)
https://en.wikipedia.org/wiki/2018_ADAC_GT_Masters
http://www.adac-gt-masters.de/uk/rennen/
https://twitter.com/GTmasters
http://www.adac-gt-masters.de/uk/tv-guide/static/
http://www.adac-gt-masters.de/livestream-adac-gt-masters.html
14-15 Apr - Oschersleben, GERMANY
28-29 Apr - Most, CZECH REPUBLIC
09-10 Jun - Red Bull Ring, AUSTRIA
04-05 Aug - Nurburgring, GERMANY
18-19 Aug - Zandvoort, NETHERLANDS
08-09 Sep - Sachsensring, GERMANY
22-23 Sep - Hockenheimring, GERMANY
24 Hours of Nurburgring (ADAC)
https://en.wikipedia.org/wiki/24_Hours_N%C3%BCrburgring
http://www.24h-rennen.de/en/
https://twitter.com/24hNurburgring
https://www.youtube.com/user/ADACZurich24hRennen
10-13 May - Nurburgring
VLN (Association of Nürburgring Endurance Cup Organisers)
https://en.wikipedia.org/wiki/Veranstaltergemeinschaft_Langstreckenpokal_N%C3%BCrburgring
http://www.vln.de/en/index.html
https://twitter.com/vln_de
24 Mar
07 Apr
23 Jun
07 Jul
18 Aug
01 Sep
22 Sep
06 Oct
20 Oct
Italian Gran Turismo Championship
https://en.wikipedia.org/wiki/Italian_GT_Championship
https://twitter.com/CIGranTurismo
Supercar Challenge
https://twitter.com/SupercChallenge
13-15 Apr - Spa, BELGIUM
19-21 May - Zandvoort, NETHERLANDS
30Jun-1Jul - Zolder, BELGIUM
13-15 Jul - Zandvoort, NETHERLANDS
17-19 Aug - Assen, NETHERLANDS
28-30 Sep - Spa, BELGIUM
19-21 Oct - Assen, NETHERLANDS