Tasmania's ambulance service has attended 11 callouts to the small southern town of Maydena since the beginning of the year, coinciding with the opening of a "gravity-focused" mountain biking park.

The new attraction opened in late January and has been drawing plenty of keen riders, with the bulk of its reviews on a social media page being five-star raves.

Social media has also hosted video of jaw-dropping accidents.

Several riders have broken bones and one rider had to be airlifted to hospital.

Jo Hurst's husband broke his collarbone after coming off a muddy track several weeks ago.

Jo Hurst's is disappointed there's been no follow-up from the proprietors about her husband's injury. ( ABC News: Emilie Gramenz )

"He left early that morning with his friends, and I think by the afternoon I got the phone call from him to say, 'I've been in an accident. I'm okay, I'm not okay, but I'm okay', and I just remember feeling sick."

She said he almost cancelled his ride because it had been raining heavily for the days prior, but the business does not offer refunds or booking changes within 72 hours.

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If the park closes due to weather, refunds or re-bookings are offered.

"The recommendation was to go to the Pandani track which is what they did. On arrival, he could see people coming off the track that were completely caked in mud," she said.

On the second time down the track, Jo's husband came off the bike in the first section and hurtled straight into a tree.

"I'm really disappointed that in almost a month since he had this accident, nobody from the park has contacted us," she said.

"From the description my husband gave me, I would say that probably the top part of the track he rode that day should have been closed and he still would have had a really enjoyable time in that lower part anyway."

Her husband is an experienced mountain biker who has cycled overseas.

In a statement, Maydena Bike Park manager Simon French said their safety team reviews all accidents, and no modifications had been made to the tracks.

There's a trained paramedic on site at the Maydena Bike Park. ( TBS Photography/Tim Bardsley-Smith )

Mr French said operators worked closely with the Department of Health and Human Services and private medical consultants to develop a "comprehensive" emergency management and safety system.

That included using professional trail design and construction services, developing a comprehensive sign-in and waiver system for guests, and implementing a signage system to display trail difficulty ratings, the rider responsibility code and to call for extensive caution.

The park has a full-time medical team with a trained paramedic as safety manager, and a volunteer patrol service to supplement the paid time. Core staff have also been given wilderness first aid training.

Emergency access roads have been developed to provide access to different parts of the park and Mr French said helicopter extraction points have been developed and GPS-referenced.

Maydena Bike Park also offers bike and safety equipment for hire for guests that do not have the appropriate equipment with them and offers "guiding and bike school products" that beginner riders and first-time visitors are prompted to use.