Listed on the Yosemite National Park website - Same one that has the lodging reservations, etc

https://www.travelyosemite.com/things-to-do/hiking/guided-group-hikes/

Bike-to-Hike Guided Group Tours

Whether you choose to rent a bike from us or bring your own, there’s no better way to explore Yosemite Valley’s floor. You’ll start your day with a bike ride past Yosemite’s most famous natural landmarks as you head to the trailhead. Once there, you’ll park your bike and begin your hike. Your guide will teach you about Yosemite’s natural history, geology and ecology along the way. Bicycle rentals are available at Curry Village and Yosemite Valley Lodge Bike Stands. The cost of bike rental is not included in the cost of the Bike-to-Hike program.

May 6 through October 2, 2022

Days of Week Monday, Wednesday, Thursday, Saturday

Time 9:00 am, except Thursday at 2:00 pm

Meeting Place Curry Village Bike Stand

Duration 2.5 Hours

Cost $35.00 per person

Max Group Size 8

Those guided “bike hikes” and other guided hikes, are offered through the Yosemite Mountaineering School, along with rock climbing lessons and guided climbs. It is not through an outside tour company.

https://www.travelyosemite.com/things-to-do/yosemite-mountaineering-school-guide-service/

Yup, but wondering if anybody has any experience with this? What fitness level/pace does this go at? We are a fit couple so if activity is geared more towards families with young kids, this might not be for us.

Any overall thoughts with experience?

I haven't been able to find any reviews or mentions from anyone that has done this as part of their trip reports

I would think that since it is family-oriented, it could be pretty slow.

Why not rent bikes and make your own adventure? Or if it is the guided experience you want, with some explanation of geology, history, etc. along with a good hike, how about their Nevada Falls hike?