Pretty sparce. You will always have the two BNSF Inside Gateway manifests (Barstow to Vancouver, WA and Barstow to Pasco, each way daily) plus a Bakersfield to Pasco train a couple of days. Southbound Canadian grain and potash trains run occasionally, too few to predict. On the UP you will have one west manifest (North Platte-Roseville), one west vehicle train (ANPMI) to Milpitas , CA and most likely at least one west loaded grainer , but could be as many as three. Its a crapshoot. So for sure, you should get a minimum of about 7 trains west of Keddie and up to as many as 10-12. UP's all westbound. Problem is trying to catch one passing through the Canyon during daylight hours. Also, you should check with the Highway Patrol to see what the conditions are on SR70. They were having lane closures and directional traffic due to the earlier flooding in the canyon. Not sure what the current status is, but it could seriously screw up you chase plans.