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_name_26 ( laps INTEGER, grid VARCHAR, fin_pos VARCHAR )

### Question ###
What is the highest Laps Led with a grid of less than 4 and a finishing position of 15?

### Accurate SQL ###

SELECT MAX(laps) AS Led FROM table_name_26 WHERE grid < 4 AND fin_pos = 15