A big dump of snow with more expected has the operators happy.
"This is great news for spring skiers and boarders,"
said spokesman Hamish Neill after the storm added 35cm of new snow.
"Some warmer weather over the last few days has had no effect on the substantial base on the main trails, and this fresh snow dump is very exciting. There is a further cold front coming through and so the snow should be in great shape for next week through to the school holidays."
Mountain manager Jono Hay said: "It's like it's winter again. With more snowfalls arriving all the way through from Thursday to Sunday they will top up all the tracks nicely throughout the week."
This Saturday a big pit of ice cold water and slush will be set up for the Bowater Motors Slush challenge.
"The truly brave then chance their arm at crossing without bombing out for a sub-zero dunking."
Rainbow's final event will be the Summit Batty Club Champs on Sunday.
"Then it's all go for spring skiing - barbecues out in the car park - skiing in T-shirts and shorts, and perhaps a late finish or two on a sunny spring afternoon.
"We are staring down the barrel at the best snowfall of the season.
"Chains will be required on the access road - and everyone should check the snow reports before coming up."
Hay predicts Rainbow will make it through to the last scheduled day of the season, Sunday, October 5.
Source: The Nelson Mail