About 270 miles and 4 hours of driving on I-15. A Tesla charges fastest when its battery is low, so the best stop is usually where you'd arrive with about 10 to 50 percent. For a car with about 300 miles of range that leaves full, that's between miles 150 and 270.
You’ll still have plenty of charge here, so charging is slower. Good for a meal or a stretch.
Hesperiaabout mile 74 · 20 stalls
Hesperia, CA - Main Stabout mile 75 · 16 stalls · 1.3 mi off the highway
Victorville, CA - Amargosa Rdabout mile 78 · 16 stalls
Victorvilleabout mile 82 · 16 stalls
Victorville, CA - Roy Rogers Drabout mile 82 · 20 stalls · 1.2 mi off the highway
Barstowabout mile 110 · 16 stalls · 1.7 mi off the highway
Barstow, CA - Tanger Wayabout mile 110 · 70 stalls · 1.6 mi off the highway
Barstow, CA - 1503 E Main Stabout mile 116 · 120 stalls
Only California Superchargers are listed; there are more across the Nevada line.
Questions
Do I need to charge between Los Angeles and Las Vegas?
Often not. The drive is about 270 miles on I-15, so a Tesla with about 300 miles of range that leaves full can usually make it. Cold weather, mountain climbs and high speeds use more range, so a short top-up is a sensible break.
Where is the best place to charge?
Charging is fastest when the battery is low, so the best stops are about 150 to 270 miles in for a car that leaves full. On this drive that window includes Baker.