user: Question: What was the distance (in miles) of the championship were the winning horse was Koona?
Columns: ['Year', 'Location', 'Distance (miles)', 'Rider Names', 'Horse Name', 'Best-Conditioned Horse']
Types: ['real', 'text', 'real', 'text', 'text', 'text']
Sample row: [2012.0, 'Bandit Springs, OR', 33.0, 'Ben Volk, Dennis Summers (M/M)', 'OMR Tsunami', 'Magic Sirocco']
SQL:

assistant: SELECT "Distance (miles)" FROM "Table" WHERE "Horse Name" = 'Koona';