It rises on White Hill and flows for approximately 23 miles to the River Ribble, of which it is the largest tributary.
The upper reaches of the river feed the large Stocks Reservoir, which provides water supply to the Fylde coast.
[citation needed] The river runs close to the College and passes adjacent to the former preparatory school, Hodder Place.
The Lower Hodder marks the historical county boundary between Lancashire and the West Riding of Yorkshire.
Its meaning is either "pleasant stream" or possibly "boundary" (Welsh yr odre), the latter suggesting that the Lancashire/Yorkshire border has its origins in the depths of antiquity.