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Whether a race, special group ride, training opportunity, or cycling-related community event, the 303 calendar showcases it all.  To have an event posted here please follow this link:  Event Policy Submission & Guidelines.

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Events for August 18, 2019

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Outdoor Divas Women’s Triathlon

August 18
Union Reservoir Longmont, CO United States + Google Map

Longmont   The 11th annual Outdoor Divas Sprint Triathlon on August 18th, awarded best women's event in Colorado by Competitor Magazine, is the all women's triathlon you've been waiting for! We intentionally keep the race cap low at 600 women to create a fun, festive, yet intimate racing environment. Great goodie bags, one of ourRead More

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The Cliff Backyard Ultra

August 18
Wellington Lake, 21843 Stoney Pass Rd
Bailey, CO United States
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Wellington Lake, Bailey   The Cliff Backyard Ultra is a unique individually supported stage-style marathon swimming competition.  This swim offers a challenging swimming opportunity for long-distance swimmers.  In this event, swimmers have the chance to test their swimming strength by completing a 1.5 Mile loop each hour, on the hour, until they no longer desireRead More

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7:30 am

Castle 5k/10k Open Water Swim

August 18 @ 7:30 am - 11:00 am
Wellington Lake, 21843 Stoney Pass Rd
Bailey, CO United States
+ Google Map

Wellington Lake, Bailey   The Castle 5K/10K is a swim in its fourth year, but its first with the Mountain Swim Series.  This event is the highest altitude organized marathon swim event in the country at ~8,000 feet.  It is hosted at Wellington Lake, near Conifer in Colorado.  Both 5K and 10K swims are available.Read More

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