Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_6210 ( "Date" text, "Course" text, "Distance" text, "Type" text, "Winner" text )

### Question ###
What is the date for the La Granja de San Ildefonso to Alto de Navacerrada course?

### Accurate SQL ###

SELECT "Date" FROM table_6210 WHERE "Course" = 'la granja de san ildefonso to alto de navacerrada'