Red Rocks gravel cycling day trip

Hello this description will be updated with more logistics when I get the next highly anticipated burst of energy. 

However, the plot is as follows: 

On Sundays, the Red Rocks Coastal Road is closed to motorised vehicles, allowing uninterrupted pedestrian access. (IDK maaaaybe there will be one or two vehicles from people who own the batches around there ? not sure how that works).

I want to ride my bicycle, I want to ride it where I like, and on the 9th of November, that’s from Red Rocks all the way to Oteranga Bay, where the high voltage cables make landfall from the South Island. Stopping for food and returning in reverse. 

I gues-timate a moving time of 2.5hours each way. Please don't hold me to that. plan to spend the whole day taking in the scenery and yapping. 

You should expect cycling over a mostly gravel/loose gravel 4wd track, with minimal elevation change, and a small amount of sandy / very loose gravel sections where you'd probably walk over.  

The tide forecast for this day (9th of November) is:
High tide - 5:32am (1.6m)
Low tide - 11:53am (0.7m)
& High tide again:  5:56pm (1.6m)

So we shouldn't need to worry about getting our toes wet if there happens to be a very coastal section to this coastal track.

Updated logistics : (reduced because i already wrote this but didn't save it  🙃

meeting 9pm

Carpark --> waiariki stream:

Eyeballed at 10.5km. estimate 1hour cycling. Nice track, formed by many vehicles that can not possibly have had any negative impact on the area at all. You will see 'red rocks', seals, birds, and other wildlife. on a clear day, the South Island and associated mountains.

waiariki stream --> Oteranga Bay (where the HVDC terminal is):

Eyeballed at 5.5km. Please read quotes from a friend regarding the condition after the stream below :

"there’s a bay that’s just past the Waiariki stream that the beach disappears at high tide, it’s claimed quite a few vehicles and dirt bikes from people getting caught out at high tide, I’m one of them who’s been caught out in a vehicle at high tide 😅"

"I’ve seen people do it but I’ve also seen them pushing their bike a lot haha. Yeah it’s not the best beach to ride a push bike on just with how the sand is"

"I’d say you would be alright tide wise, it takes like 6hrs for for the tide to change, and if you were to start heading out for when the tide is going out you’ll have heaps of time to get back round"

Alternative route: 

waiariki stream -->uphill to wind turbines -->> back down to Oteranga Bay:

"It's pretty tough."

would reduce anxiety around tides. would provide good views. could be used as a backup if going along the coast and we take too long & the tides change. 
Also would require confirmation with key/permission, TBC

When you sign up, you will have the opportunity to give your thoughts, just a chill ride to the stream? or more of an adventure ?? Im easy with either, and kinda planned this ideally to be chill.