siblings of Head of the River xx

half siblings maternal

horse On The Warpath xx (Thoroughbred, 1971, from Never Bend xx)

On The Warpath xx
gender-male
1971

Never Bend xx / First Landing xx

stallion Run The Gantlet xx (Thoroughbred, 1968, from Tom Rolfe xx)

Run The Gantlet xx
gender-male
1968

Tom Rolfe xx / First Landing xx

broodmare Spring is Here xx (Thoroughbred, 1972, from In Reality xx)

Spring is Here xx
gender-female
1972

In Reality xx / First Landing xx