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_15315816_1 (year VARCHAR, tournament_location VARCHAR)

### Question ###
When are all years that tournament location is Western Turnpike Golf Course?

### Accurate SQL ###

SELECT year FROM table_15315816_1 WHERE tournament_location = "Western Turnpike Golf Course"