It could start as soon as Monday the 29th (given that promos tend to start on Mondays) - it might not start until sometime next month.

The Summer Ride is a board game - you roll a die (3 times every 12 hours) and make moves. The main objective is to collect the Keys to open the Doors to move to the next board. Along the way there are gifts of various sizes you can collect that will give you a prize. If you can make it to the Final Board - you'll have a chance to win Brave Purple (The final Rainbow Divine) as well as a Falabella Divine by landing on their gift space.

Here's a screen shot of one of the boards:

*The Golden Horse is your 'playing piece'
The 'Lightning bolts' are objectives
The boxes are gifts
The stars are Teleporters (you can move from one teleport to another of the same color)

And here's a shot of the Prize list - which includes the next Breed of horse to be added...The Shire, who is a Draft Horse:


*the Black text denotes what size gift the prize is found in. Note that unlike the Winter Magic Rides - when you land on a gift space, it is opened automatically and you win a random gift chosen from the 'pool' of items for that size.

The breed page of the Shire:


Like the Percheron - Shires can only breed 3 times in their lives, and only with other Draft horses (so you can breed Shires and Percherons together - but you can't breed Shires with Riding horses, Ponies, etc)

Here's a shot showing all 5 boards and the location of Keys, Gifts, and Challenges:
The following are Screen shots of each board showing what gifts are where. Apologies this is in French and for the red lines on these images (they show the most 'direct' route to navigate a board BUT as moving is heavily based on luck when rolling (ex. rolling a 3 when a 3 is the only good move you can make) - it's best to just take them as a guideline and not follow them exactly as some points have more than one option.

Board 1

*The Friend gift (the red present in the bottom left hand corner* will NOT be there in the actual. You only get a Friend gift if one is sent to you by another friend (it will always land on the board you are currently on when sent)

Board 2


Board 3


Board 4


Board 5

*Silver Token is a Falabella - Gold Token is Brave Purple
~
Divine information:

Brave Purple is one of the Horses of the Rainbow.

He gives you one diamond every Sunday (after the daily update), provided you logged in at least once over the previous 3 days.

Once you own all the 7 Horses of the Rainbow, you can obtain Secret Rainbow.
Game:
1 x diamond every Sunday
VIP:
Energy consumption when your horses perform missions on Sundays is halved

This horse cannot be sold.
~
Additional help is gotten for this promo in the form of Dice Packs. Sold for 1 pass - these give you 2 additional rolls (there will also be an event later on that gives 3 rolls for the price of 2).
~
The list of objectives and the rewards you get from them:

1. Groom a Horse = Able to roll the die 3 times every 12 hours

2. Donate X amount of Equus to Ow = Able to teleport to the highlighted space

3. Give an apple to a horse that is 10 years old = 3 bonus rolls *horse must be exactly 10*

4. Enter X amount of competitions = Able to teleport to the highlighted space

5. Take a horse on a 5 hour ride = Move to a space of your choice within a radius of 4 spaces *Means take a horse on a 5-hour consecutive ride of any kind*

6. Find an Aging Point UFO = Able to teleport to the highlighted space

7. Remove a Pegasus' Wings = 5 bonus rolls

8. Win X amount of competitions = Able to teleport to the highlighted space

9. Open a Horn of Plenty = 4 bonus rolls

10. Donate X amount of Equus to Ow = Move to a space of your choice within a radius of 6 spaces

11. Give birth to twins = 5 bonus rolls

To clarify something about the rewards:

Number 1's reward is the only one to change how many times you can roll. It's the tutorial challenge that everyone will get.

2, 4, 6, and 8 allow you the option to move to a space the game chooses (apologies I don't know if there's any sort of pattern to the spot chosen)

5 and 10 allow you to move to any space within a 4 and 6 space radius from your current position respectively

All other rewards simply give you the option to throw the die again for however many times it allows.

Most players tend to use between 10 to 30 passes on average to win the Divines But again, it's dependent on being lucky enough to roll what you need when you pay for rolls.