James - Club Riding is very personal - but at your level try BCI or OCRR - they each have a way variance of skilled riders and you should be able to find a group within those clubs that suits you. Once the fast groups of either club seem slow then move on to Como and other groups. But just know BCI and OCRR both have fast, long hard riders....
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Private docent led mountain bike rides through Limestone Canyon. Go to
letsgooutside.org and register today! Also available: hikes, equestrian rides and family events as well as trail maintenance and science study.