Mrs Lind said she was proud of completing the challenge, having raised more than $500 for the organisation.
To mark her finish, the Coastguard, as well as friends she had swam with, came to cheer her on for the final push, although her friends did not get in with her, she said.
The lake was only 9°C, but it was still five warmer than the outside air.
"I still feel like I got the warmer end of the deal."
The Coastguard was an important organisation to Mrs Lind as both her husband and father-in-law volunteered for them.
Her father-in-law told her about the "Big Swim" fundraiser, which is one of the biggest the Coastguard ran.
Mrs Lind, being a passionate swimmer, decided to take on the challenge to recognise how important the Coastguard is to Central Otago.
"I ... really wanted to do something to help give back to them, because I think they play a really vital role in our district.
"If you come off riding your bike on the Dunstan Trail, it’s actually the Coastguard that’s going to come get you."
The Big Swim had participants set targets for how far they would swim during June.
Swimmers could hit their targets by breaking it into smaller pieces, completing it in any body of water.
Mrs Lind set her sights high with a 25km goal,
planning to complete it bit by bit throughout the month.
For her the real challenge was not the swimming itself but rather finding the time to swim in her busy life, with her two children aged 2 and 5.
"I get to the pool as it opens at 6am and usually I only get about 45 minutes in the pool before I’ve then got to get out.
"I’ve also got to get them ready for a day of school and me ready for work and be at work by 8.30am."
Not only did the Coastguard benefit from her challenge, she found the experience had been good for her mental health, as it allowed her to do something she loved.
"It’s a really good way of you pushing yourself to do something but you’re also doing something good at the same time."
Mrs Lind wanted to take part in the Big Swim every year from now and hoped as her two children got older finding the time to swim would become easier.
