Welcome to the Home of Islander Athletics
As Athletic Director, I am proud to support our student-athletes, coaches, and community in fostering a culture of sportsmanship, dedication, and personal growth.
At MIHS, athletics play a vital role in developing strong hearts, strong minds, and strong leaders. Our 28 athletic programs are an extension of the classroom, offering students opportunities to grow through competition, teamwork, and perseverance.
With a legacy of competitive excellence, our goal is to provide every athlete with a rewarding and inclusive experience that builds character and Islander pride.
Whether you're a current student, future Islander, or loyal fan, thank you for being part of our community. Your support enables us to continually enhance our programs and empower our students to thrive both on and off the field.
Go Islanders!
Lindsey Blaine
Athletic Director
📝 Registration Information
🔗 Register via FinalForms
All MIHS sports registration is completed through FinalForms.
➡️ Click here to access FinalForms
New users will need to create an account to register.
📘 Need help?
View step-by-step instructions for FinalForms setup
FOR ANY NON Student, looking to participate in sports here at Mercer Island High School, you will need to enroll with the high school. Enrollment information can be found https://www.mercerislandschools.org/enrollment/newstudents.
You will need to note it is for SPORTS ONLY. Once enrolled for sports only, you will be able to proceed to register in FinalForms.
💳 Payment
You must also complete a simple online registration through InTouch when paying your sports fee.
➡️ Click here for InTouch Registration & Payment
Directions to register for sports in InTouch
📅 Key Registration Dates
| Season | Registration Closes | First Day of Practice | |
|---|---|---|---|
| Fall Sports | August 22, 2025 | August 25, 2025 | |
| Football | August 18, 2025 | August 20, 2025 | |
| Winter Sports | November 11, 2025 | November, 17, 2025 | |
| Gymnastics | November 3, 2025 | November 10, 2025 | |
| Spring Sports | February 27, 2026 | March 2, 2026 |
🗓️ Registration for all sports opens July 27, 2025
🩺 Physical Requirement
Incoming 9th graders: Physicals from middle school do not transfer to the high school.
Please directly upload to your Final Forms account
💰 Sports Fees & ASB
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$550.00 per sport per season, (includes $100 for transportation fee.)
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ASB Card required: $100
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Pay online via InTouch
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Payment plan options available — contact Becky LeMaster for details.
🔁 Refund Policy:
You may request a refund within the first two weeks of the season.
No refunds will be issued after that point. (Refer to the Eligibility Handbook.)
👕 Uniform & Equipment Return Policy
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Late return = $25.00 late fee
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Missing uniform/equipment = full replacement cost
Uniforms must be returned during the designated collection period to avoid penalties.
