Runners who missed out on Grandma's Marathon have alternative options. One way to participate is by raising money for charity, which allowed about 1,900 runners to secure bibs last year.

A nationwide birding event is also taking place, although details are limited. Additionally, backcountry skiers are preparing for winter.

Further information on these events, including Grandma's Marathon and the birding event, is available from the source, providing more details for those interested in participating or learning more.