Despite the 38 degree rainy weather and a headwind of 10 miles per hour on Monday, 30,087 participants — runners, wheelchairs and hand cyclists — were signed up to participate in the 122nd Boston Marathon.

The 119th edition of the Boston Marathon took place Monday, as over 30,000 people took part in the world’s longest-running marathon, which began in Hopkinton and ended in the middle of Boston. Thousands...