We are a family-run swim business located in Boise, Idaho that has been serving families from all over the Treasure Valley for more than 15 years. We are passionate about educating children and adults of all ages about water safety, basic swimming skills, and stroke development in a safe, positive, encouraging, and FUN environment. We teach small classes in a warm, heated pool with excellent, motivated teachers who work very hard to ensure that children learn how to really SWIM!



Thursday, March 26, 2026

Swim 2026




UPDATE: If you missed registration, don't fret!  We still have many spots open!

Hello swimmers!  We are excited for another great summer of swim lessons!  Cathy's School for Lil Fish offers private and shared private lessons.  We focus on a quiet learning environment, highly experienced instructors and individualized instruction to help your swimmer make real progress.  You can view the lesson schedule here. You can also learn more about our class offerings and pricing here.  Registration will open on Thursday, April 23rd at 8:30 pm MST.  At that time, this REGISTRATION FORM will go live!  



Wednesday, June 11, 2025

 Rain rain, go away!  The radar is saying this should pass quickly.  We canceled the 9-9:30 classes, but hope we'll be able to


swim the rest of the day.

Saturday, May 24, 2025

 LAST MINUTE SWIM SPOTS!!!


Hey Swimmers! After some last minute changes we have swim new spots! They are all semi-private classes.
May 26-29 from 3:45-4:00 and 4:00-4:15
and June 2-5 from 9:45-10, 10:00-10:15 (2), 10:30-10:45 (2), 11:00-11:15, 1:15-1:30 and 3:45-4:00.

If any of these interest you, please reach out to Cindy 208-713-8113 or Cathy 208-914-0045 and we'll get you signed up.


 

Tuesday, April 15, 2025

Summer Swim Registration

 

Hello Lil' Swimmers! 🐬

We’re thrilled to welcome you back for our 29th season of swimming fun! Here’s everything you need to know to get started this year:

Class Options

We offer three types of classes:

  • Semi-Private
    These can function as one-on-one private lessons, but two lessons happen in the pool at the same time—each with a separate instructor.

  • Family Group
    Great for sibling, cousins or close friends of different abilities learning together!

  • Mommy & Me
    Perfect for our littlest swimmers (6 months - to 3 years old) to enjoy the water alongside a parent or caregiver.

👉 For detailed descriptions and pricing, please click the "Class Options" tab above.


Choosing Your Class

Once you've picked the type of class you’re interested in, head over to the "Schedule" tab to view this summer’s available weeks and time slots.


Registration Info

🗓 Registration opens Thursday, May 8th at 8:30 PM (EVENING).

We’ve chosen this time to avoid most extracurricular conflicts while still being early enough for those with early bedtimes.

At 8:30 PM, the registration FORM will go live. Simply click this link, fill in your preferred dates and times, and you’ll be done in about 2 minutes!


What Happens Next?

Over the following 48 hours, we’ll fill classes on a first-come, first-served basis using the timestamp from the submitted form. You’ll receive a confirmation email with your class time, payment details, and any additional information.

We can’t wait to see you in the pool this summer! 💦

Let’s make our 29th season the best one yet!


Saturday, March 8, 2025

2025 Swim Lessons

The sun is starting to shine, the days are getting longer and it's warming up..... a little :)  Cathy's School for Lil' Fish WILL be offering lessons this summer.  We teach in a heated, outdoor pool so we only offer lessons June - August.  We will be working with our teachers over the next month to put together our summer 2025 schedule.  Please check back here after April 15th to see our schedule and for information about when we'll be opening up registration.  Happy Spring!!!!

Monday, June 17, 2024

All classes cancelled for today

 We really hate to do this, but the combination of winds, low temperatures, clouds and possibly rain is a miserable start to swim classes so we are cancelling our 9-12 classes this morning and will do makeup lessons this Friday, June 21st.  Feel free to call us if you have questions.

UPDATE:  We are also cancelling all classes today.  Makeup lessons will be held Friday, June 21, so we are planning on Tuesday-Friday this week for all classes 9-6:30.



Thursday, June 13, 2024

Several swim spots available July 8-18, July 22-25 and July 29-Aug. 1

               
             It's not too late to sign up.  Just give us a call and we can let you know the specific times available and cost.

Tuesday, May 21, 2024


 Don't wait!  Jump on these new swim spots added!  

June 3-6 semi private 2-4

June 10-13 semi private 2:15-3:30

July 8-18 semi private 9:00-3:45
July 22-25 semi private 9:00-4:00
Mommy and me 6:00-6:30
July 29-Aug. 1 semi private 10:00-4:00
Give us a call or go to our registration page!

Thursday, April 25, 2024

Still time!

 If you think you missed your opportunity to register for swim lessons......you didn't!!!  Although our evening classes are full, there are still plenty of options between 9:00 and 3:00 in our semi-private lessons.  Click on the schedule tab at the top of the page to see what's available and then click on http://www.boiseswimminglessons.com/p/registration.html to register!  We look forward to seeing you all poolside.  





Monday, April 22, 2024

One change to our summer schedule 2024

 Please note this change to our posted swim schedule!!! Our first day of lessons was posted as, Monday, May 27th, but that is Memorial day so we will begin lessons, Tuesday, May 28th and have lessons that week through Friday, May 31st. The second week of that session will meet Monday-Thursday as usual, finishing on Thursday, June 6th! Please take this into account if you are planning on signing up for that first session.



Monday, March 25, 2024

Summer 2024 Swim Lessons


Swimmers!  We are looking forward to seeing you all again.  We have some good news.  With the cost of everything going up, Cathy’s School for lil Fish is actually lowering the cost per class of our semi-private swim lessons this summer.  We found that private swimming lessons were highly effective for our students but were more expensive and decreased the number of spots available for students so this year we are offering more options!  Depending on your family’s needs, you can choose to book either 1-week sessions of lessons or 2-week sessions (lessons are held Mon – Thurs each week).  We will offer three different kinds of lessons:

1. Semi-Private lessons

2. Family Group Lessons

3. Mommy & Me Classes

In place of private lessons, we are slightly altering our lessons to be semi-private.  What that means is your student will still have 1 on 1 instruction (or 1 on 2 if you choose), but there will be another class (same size) in the pool at the same time.  For example, your 2 beginner swimmers could work with one teacher and your intermediate student could be working with another teacher during the same 15-minute lesson in another part of the pool.  That shortens your time poolside, reduces each class tuition by 20% and allows us to help more kids learn to swim this summer!

 For more details on the types of classes and the cost, please click on “Class Options” at the top of the page!   

Registration will open on Wednesday, April 24th, at 8:30 p.m. Click on the "Registration" tab at the top of the page for details on this process!

Thursday, July 27, 2023

Need a little more summer! Swim lessons aren't over!

 We still have several swim spots available for Aug. 7-10. They are all private lesson spots. We are also offering late afternoon/evening classes Aug. 14-17 and Aug. 21-24, which could be private or family group lessons. If you are interested please text/call Cindy at 208-713-8113.


Saturday, July 15, 2023

A swim spot

 Hi everyone!  We had a last minute cancellation and I've been working off of the wait list but haven't found a good fit.  The class is next week July 17-20 from 1:15-1:30.  If you are interested, give Cindy a call.  (Cathy is Shining this weekend) 208-713-8113.


Monday, June 19, 2023

Cloudy, cool but we are swimming!

 We know conditions aren't perfect, but we are planning on lessons today!  Our smiles will bring the sunshine



Saturday, May 13, 2023

Swim Lessons for 2023 are FULL!

Our swimming lessons for 2023 are full.  If you are interested in joining our waitlist, please fill out this form here: https://forms.gle/Wn67umKKSu4E6LPX9

We always have cancellations throughout the summer and are hoping to add some additional classes, so taking 5 minutes to join the waitlist is definitely worth it!  Let us know if you have questions!

Saturday, April 15, 2023

Registration for 2023 Swim Lessons will be April 27th

Registration opens at 8 p.m. this evening, April 27th!  Please note that we JUST added additional classes to the week of June 12th, so that schedule changed slightly. 

TO RESERVE YOUR SPOT, GO HERE FIRST: 

https://www.signupgenius.com/tabs/1357FD900A6CAE4C06-cathys1


AFTER YOU HAVE A SPOT RESERVED, fill out one registration form per family:

https://forms.gle/C6XU7ChMgJGo2yem7


IF THERE ARE NO SPOTS AVAILABLE WHERE YOU NEED THEM, please fill out this form to be put on the waiting list.  Those on the waiting list will be placed in open spots in the order they signed up.

https://forms.gle/Wn67umKKSu4E6LPX9


We are excited to bring another summer of swimming to our amazing families!  This year we will only be offering private lessons, family group lessons and Mommy & Me classes.  We will not be offering group lessons.  However, you are welcome to share your private or family group lessons with friends.  For details on the classes offered and schedule, please click on the "schedule" tab at the top of this page.  Registration will open Thursday, April 27th, at 8:00 p.m. MST.  BEFORE that time, we recommend thoroughly reading the "Schedule", "Levels" and "Registration" tabs on this page so that you understand the registration process.  Also, PLEASE watch this 13 minute video walking you through the registration process BEFORE April 27th at 8 p.m. We look forward to swimming with you in 2023!



Saturday, April 1, 2023

2023 Swim Season

 Hi everyone!!! Registration for Swim Lessons 2023 will be postponed by a few weeks this year due to one of our owners being out of the country.  Please check back here on April 15th for an update. We are hoping to have our schedule posted by then.  Registration will most likely happen around the end of April and lessons won't start until June.  We look forward to seeing you this summer!

Monday, August 1, 2022

A few more lessons available

 Hey everyone, we have just a few private lesson spots available for Aug. 15-18.  These classes will be taught by Mr. Tyler between 12:30 and 2:30 in 15 minute increments.  If you are interested, please email us your student's name, age and swim level at cathyslilfish@gmail.com.  The spots will be filled first come first served.  


Wednesday, May 18, 2022

Registration Closed - Classes Are Full - Waitlist Information

 Thank you for your interest in our swim school!  Our summer 2022 classes are currently full.  The spots we do have open are being filled by people on the waitlist so if you're interesed in classes, please fill out the form below to be added to our waitlist and I will contact you if we get openings!

https://forms.gle/SoYDbnT7USQm5KXQ9

Monday, May 9, 2022

Group Lessons Registration Opens May 13th

 Hello Little Fish!  Registration for traditional group swimming lessons will open this year on Friday, May 13th at 7:00 a.m. and will remain open until we have 100 families registered.  Our Private and Family Group Lessons are currently FULL.  If you would like to be on the waiting list for ANY lessons (private, Family Group or Traditional Group Lessons), please fill out this form:

https://forms.gle/SoYDbnT7USQm5KXQ9

Instructions for Registration on May 13th:
1. Click on "levels" at the top of this page first and read to determine which level your students is at.  Then click on "schedule" at the top of this page to decide ahead of time which date(s) and time(s) you'd like to register for. 

2. When registration opens, click on this link to take you to the registration form and fill it out.  It will ask for your name, phone number and email, your child(ren)'s name(s), age(s) and level(s) and which session(s) and time(s) you want.  You can either put exact times you are hoping for OR (Even better) a time frame. For example, you might type: July 11 - 21 between 9:00 and 11:30.  THERE IS A VIDEO BELOW THAT WALKS YOU THROUGH THIS PROCESS IF YOU FEEL CONFUSED :) The link will go live at 7 a.m.   
3. When you click submit at the end, you will get a confirmation message letting you know that we've received your form.  All of the forms will be time stamped, and we will respond to requests in the order that they are received.  Please keep in mind that in past summers, we have received more than 200 forms in the first 3 minutes of registration so even if you register right at 7:00, it may take up to 48 hours to get back to you. 

4.  After you register you will receive an email confirming your session(s) and class time(s), however your spot is NOT held until we receive payment.  All money is due by June 1st regardless of which session you register for and you will receive a confirmation email that your payment has been received. If you do NOT receive an email confirming that we have received payment, please contact us to make sure that we have received payment or your spot will be given to someone else.  Your tuition is NOT refundable except in the case of extreme illness of the student.