Prague Marathon runners come through the Powder Tower, Prague, UNESCO World Heritage Site, Bohemia, Czech Republic, Europe

View of runners near Ote-bori Moat, The East Gardens of the Imperial Palace, on a sunny day, Chiyoda, Tokyo, Honshu, Japan

The Undercliff Walk between Brighton and Saltdean, City of Brighton and Hove, East Sussex, England, United Kingdom

Female runner jogging along the Marina at Parque das Nacoes, Lisbon, Portugal, Europe

Black jacks (Caranx lugubris), blue runners (Carangoides crysos) and chubs (Kyphosus sectatrix), schooling in open water. St. Peter and St. Paul's rocks, Brazil, South America

Blue runners (Carangoides crysos) schooling in open water, St. Peter and St. Paul's rocks, Brazil, South America

Black jacks (Caranx lugubris) and blue runners (Carangoides crysos), schooling in open water. St. Peter and St. Paul's rocks, Brazil, South America

Blue runners (Carangoides crysos) schooling in open water, St. Peter and St. Paul's rocks, Brazil, South America

Young woman runs in the evening mood at Falkenstein, Allgäu, Bavaria, Germany

Runners on an empty path in the morning hours, running, sports, general

Runners on an empty path in the morning hours, running, sports, general

Runners on an empty path in the morning hours, running, sports, general

Runners on an empty path in the morning hours, running, sports, general

Runners on an empty path in the morning hours, running, sports, general

Runner enjoys the sunrise in the morning hours, running, sports, allgäu

Woman runner runs on road in sunset, sport, forest

Runners on an empty path in the morning hours, running, sports, general

Runner enjoys the sunrise in the morning hours, running, sports, allg? U

Runners on an empty path in the morning hours, running, sports, general

Runners on an empty path in the morning hours, running, sports, general

Runners on an empty path in the morning hours, running, sports, general

Young woman drinking after a run

Jogger in the old Elbe Tunnel, Hamburg, Germany, Europe

Runner in a blue shirt in a field with mountains in the background

View taken from behind of a woman in a straw hat sitting on the top of a mountain cliff looking out onto the brilliant, blue water of the Pacific Ocean and mountainous coastline along the Kalalau Trail on the Napali Coast, Kauai, Hawaii, United States of America

View taken from behind of a woman in a straw hat standing on the top of a mountain cliff looking out onto the brilliant, blue water of the Pacific Ocean along the Kalalau Trail on the Napali Coast, Kauai, Hawaii, United States of America

Micronesia, Yap, The Rainbow Runner is found in large schools which travel in the first 100 feet of the water column. This species is reported to reach six feet in length, but is most common under three feet.

Hawaii, Oahu, Lanikai, Young woman running on beach.

California, Morro Bay, Silhouette of man jogging on beach.

Hawaii, Oahu, Lanikai, Young woman running on beach.

Running Sculpture With a Downtown Background, Vancouver, British Columbia, Canada

Jogger on snowy road