About ¼ or a fourth of the way, you can stop at Dolan Springs, AZ. This is a little over 1 hour southeast of Spring Valley.
About ⅓ or a third of the way, you can stop at Kingman, AZ. This is about 1½ hours southeast of Spring Valley.
About ⅔ or two thirds of the way, you can stop at Six Mile Crossing, AZ. This is almost 3 hours southeast of Spring Valley, or almost 2 hours northwest of Goodyear.
About ¾ or three fourths of the way, you can stop at Congress Junction, AZ. This is about 3½ hours southeast of Spring Valley, or about 1 hour northwest of Goodyear.
If you drive straight through without stopping at all, the total distance is 285 miles. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 4 hours, 32 minutes.