2018 NASCAR K&N Pro Series West
The 2018 NASCAR K&N Pro Series West was the sixty-fifth season of the K&N Pro Series West, a regional stock car racing series sanctioned by NASCAR. It began with the Bakersfield 175 presented by NAPA Auto Parts at Kern County Raceway Park on March 15 and concluded with the NAPA Auto Parts 175 presented by West Coast Stock Car Hall of Fame at Kern County Raceway Park on October 27. Todd Gilliland entered the season as the defending Drivers' champion; however, he did not go for three in a row, because he moved up to the Truck Series in 2018. Derek Thorn, the 2013 West Series champion, won his second championship in his first full season since his first title, 27 points in front of his Sunrise Ford Racing teammate Ryan Partridge, who also returned to the series in 2018 after a year off in 2017.
Drivers
;Notes:Schedule
On December 11, 2017, NASCAR announced the 2018 schedule. The two races at Irwindale were dropped from the schedule in favor of a second race at Tucson and a race at Gateway. The Las Vegas Motor Speedway Dirt Track was added to the schedule, marking the series' first race on dirt since 1979 at Ascot Park. All races in the season are televised on NBCSN on a tape delay basis.| No. | Race Title | Track | Date |
| 1 | Bakersfield 175 presented by NAPA Auto Parts | Kern County Raceway Park, Bakersfield | March 15 |
| 2 | Port of Tucson Twin 100s | Tucson Speedway, Tucson | May 5 |
| 3 | Port of Tucson Twin 100s | Tucson Speedway, Tucson | May 5 |
| 4 | Sunrise Ford 150 presented by NAPA Auto Parts | Orange Show Speedway, San Bernardino | May 19 |
| 5 | NAPA Auto Parts 175 | Colorado National Speedway, Dacono | June 9 |
| 6 | Carneros 200 | Sonoma Raceway, Sonoma | June 23 |
| 7 | Clint Newell Toyota 150 presented by NAPA Auto Parts | Douglas County Speedway, Roseburg | June 30 |
| 8 | Casey's General Store 150 | Iowa Speedway, Newton | July 27 |
| 9 | NAPA 175 presented by the West Coast Stock Car Hall of Fame | Evergreen Speedway, Monroe | August 11 |
| 10 | Monaco Gateway Classic | Gateway Motorsports Park, Madison | August 24 |
| 11 | Star Nursery 100 | Las Vegas Motor Speedway Dirt Track, Las Vegas | September 13 |
| 12 | NAPA Auto Parts Idaho 208 | Meridian Speedway, Meridian | September 29 |
| 13 | NAPA AutoCare/Roseville Toyota 200 presented by TriCo Welding Supplies & the West Coast Stock Car Hall of Fame | All American Speedway, Roseville | October 13 |
| 14 | NAPA Auto Parts 175 presented by West Coast Stock Car Hall of Fame | Kern County Raceway Park, Bakersfield | October 27 |
;Notes:
- The race at Spokane County Raceway, originally scheduled for 15 July, was cancelled and would not be replaced.
Results and standings
Races
;Notes:- 1 – Starting grid was set by the fastest lap times from the first Port of Tucson Twin 100 race.
- 2 – The qualifying session for the Monaco Gateway Classic was cancelled due to weather. The starting line-up was decided by Practice results.
Drivers' championship
;Notes:
- ‡ – Non-championship round.
- 1 – Bill Kann and Hershel McGriff received championship points, despite the fact that they did not start the race.
- 2 – Scored points towards the K&N Pro Series East.