全球气候变暖正迫使美国各地马拉松赛事组织者重新审视传统的比赛日期和时间安排。1双城马拉松宣布将从2027年起，把传统的10月第一个星期日改至月底举行。1苏瀑瀑布马拉松在2024年因高温取消后，也决定将比赛从8月改至9月。1
气候研究机构Climate Central对221场比赛进行的研究显示，到2045年，美国51个马拉松中的46个将难以实现最佳跑步条件。1最适合跑马拉松的温度约为华氏50度，即摄氏10度左右。12024年地球创下有记录以来最热的一年，美国还录得连续最暖的7月。1世界气象组织预测，在2025年至2030年间，地球平均气温相比19世纪将上升超过1.5摄氏度。1
面对高温挑战，部分赛事已采取相应措施。洛杉矶3月马拉松允许选手在完成18英里后即可领取完赛奖牌，在超过27,000名参赛者中，不足5%的人选择提前结束比赛。1
Marathon organizers across the United States are making significant changes to combat the effects of warming temperatures on race conditions.1 The Twin Cities Marathon will shift its traditional first Sunday in October to the end of the month beginning in 2027, while the Sioux Falls Marathon relocated its event from August to September following a heat-related cancellation in 2024.1 The Los Angeles Marathon in March has introduced an optional early finish, allowing participants to collect their completion medals after running 18 miles rather than the full distance, with fewer than 5 percent of the over 27,000 participants choosing to exit early.1
Research underscores the urgency of these adaptations. A Climate Central study examining 221 marathons found that by 2045, 46 of 51 major American marathons will face increasingly difficult conditions to achieve ideal running temperatures, defined as around 50 degrees Fahrenheit.1 This projection reflects broader climate trends: 2024 marked the warmest year on record, and the United States experienced its warmest July.1 The World Meteorological Organization predicts that between 2025 and 2030, global average temperatures will rise more than 1.5 degrees Celsius above 19th-century levels.1
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