Mount Si Baseball

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Mount Si Baseball Mt Si Baseball is part of the Kingco 4A Conference in Washington state.

𝗜𝗻𝘁𝗿𝗼𝗱𝘂𝗰𝗶𝗻𝗴 𝗼𝘂𝗿 𝗻𝗲𝘄 𝗩𝗮𝗿𝘀𝗶𝘁𝘆 𝗛𝗲𝗮𝗱 𝗖𝗼𝗮𝗰𝗵We're excited to welcome Derek Decater as the new Varsity Head Baseball Coach at M...
09/24/2026

𝗜𝗻𝘁𝗿𝗼𝗱𝘂𝗰𝗶𝗻𝗴 𝗼𝘂𝗿 𝗻𝗲𝘄 𝗩𝗮𝗿𝘀𝗶𝘁𝘆 𝗛𝗲𝗮𝗱 𝗖𝗼𝗮𝗰𝗵

We're excited to welcome Derek Decater as the new Varsity Head Baseball Coach at Mount Si High School! A Washington native and Skyline High School standout, Derek was a four-year varsity letterwinner and two-time KingCo Player of the Year before playing outfield at the University of Arizona, where he earned Freshman All-American honors.

Derek brings a wealth of playing, coaching, and player-development experience to the Wildcat program, including time on the Mount Si staff before stepping into this Head Coaching role.

His philosophy: build competitive, confident, and accountable young men who represent Mount Si and the Snoqualmie Valley the right way.

Welcome Coach Decater! ⚾️

The work before the season starts now. Open Gym kicks off September 14 at the MSHS Weight Room — Mon/Wed 3:30-4:30, Thu...
09/09/2026

The work before the season starts now.

Open Gym kicks off September 14 at the MSHS Weight Room — Mon/Wed 3:30-4:30, Thurs 2:45-3:45. 100% optional, all are welcome. Go 'Cats! ⚾️🐾

Get on our email list now so you don't miss news of offseason workouts, future open field dates sponsored by the Booster...
09/09/2026

Get on our email list now so you don't miss news of offseason workouts, future open field dates sponsored by the Booster Club, gear info, and more.

🔗https://forms.gle/J9igJJ4hGnkyYwSH7

(Link in bio)

The application window is now open for the 𝗛𝗲𝗮𝗱 𝗕𝗮𝘀𝗲𝗯𝗮𝗹𝗹 𝗖𝗼𝗮𝗰𝗵 position at Mount Si High School. 𝗔𝗽𝗽𝗹𝘆 𝗵𝗲𝗿𝗲 ➡️ 𝗵𝘁𝘁𝗽://𝗯𝗶...
08/04/2026

The application window is now open for the 𝗛𝗲𝗮𝗱 𝗕𝗮𝘀𝗲𝗯𝗮𝗹𝗹 𝗖𝗼𝗮𝗰𝗵 position at Mount Si High School. 𝗔𝗽𝗽𝗹𝘆 𝗵𝗲𝗿𝗲 ➡️ 𝗵𝘁𝘁𝗽://𝗯𝗶𝘁.𝗹𝘆/𝟰𝘅𝗵𝗥𝟴𝗭𝘆

As the Mount Si Baseball Booster Club, we're excited to spread the word and encourage qualified candidates who are passionate about developing student-athletes, building a positive culture, and leading a competitive baseball program to apply.

The selection process is managed by Mount Si High School / Snoqualmie Valley School District.

𝗟𝗮𝘀𝘁 𝗰𝗵𝗮𝗻𝗰𝗲...𝘁𝗶𝗰𝗸𝗲𝘁 𝘀𝗮𝗹𝗲𝘀 𝗰𝗹𝗼𝘀𝗲 𝗧𝗵𝘂𝗿, 𝟳/𝟯𝟬 𝟭𝟭:𝟱𝟵𝗽𝗺 - 𝗟𝗶𝗺𝗶𝘁𝗲𝗱 𝘁𝗶𝗰𝗸𝗲𝘁𝘀 𝗿𝗲𝗺𝗮𝗶𝗻.🎆Fireworks after the game🎟️Save up to 60% n...
07/30/2026

𝗟𝗮𝘀𝘁 𝗰𝗵𝗮𝗻𝗰𝗲...𝘁𝗶𝗰𝗸𝗲𝘁 𝘀𝗮𝗹𝗲𝘀 𝗰𝗹𝗼𝘀𝗲 𝗧𝗵𝘂𝗿, 𝟳/𝟯𝟬 𝟭𝟭:𝟱𝟵𝗽𝗺 - 𝗟𝗶𝗺𝗶𝘁𝗲𝗱 𝘁𝗶𝗰𝗸𝗲𝘁𝘀 𝗿𝗲𝗺𝗮𝗶𝗻.

🎆Fireworks after the game
🎟️Save up to 60% normal gameday prices
✅Support Mount Si Baseball - % of ticket sales helps fund the 2027 season activities for the Wildcats

Get your tickets at: https://www.mountsibaseball.com/mariners-tickets

Time is running out...ticket sales close Thur, 7/30 11:59pm. 🎆Fireworks after the game🎟️Save up to 60% normal gameday p...
07/25/2026

Time is running out...ticket sales close Thur, 7/30 11:59pm.

🎆Fireworks after the game
🎟️Save up to 60% normal gameday prices
✅Support Mount Si Baseball - % of ticket sales helps fund the 2027 season activities for the Wildcats

Get your tickets at: https://www.mountsibaseball.com/mariners-tickets

Have you taken advantage of this great deal? Join us at the Mount Si Baseball Community Day at T-Mobile Park, next Frida...
07/21/2026

Have you taken advantage of this great deal? Join us at the Mount Si Baseball Community Day at T-Mobile Park, next Friday night, July 31, 7:10pm as the Mariners take on the Twins.

🎆fireworks after the game
🎟️deeply discounted tickets - up to 60% normal game day prices
✅support Mount Si Baseball

Get your tickets at: https://www.mountsibaseball.com/mariners-tickets

MLB All-Star break is a the perfect time to secure your discounted Mariners tickets for Fri 7/31 7:10pm and join us at t...
07/15/2026

MLB All-Star break is a the perfect time to secure your discounted Mariners tickets for Fri 7/31 7:10pm and join us at the Mount Si Baseball Community Day.

🎆firework night after the game
🎟️deeply discounted - up to 60% normal game day prices
✅support Mount Si Baseball

Get your tickets at: https://www.mountsibaseball.com/mariners-tickets

We’re headed to Districts.Next up is the District 1/2 Tournament and the drive to qualify for State.The ’Cats begin the ...
05/06/2026

We’re headed to Districts.

Next up is the District 1/2 Tournament and the drive to qualify for State.

The ’Cats begin the journey Thursday 5/7 vs Skyline. First pitch 4:00pm at Eastlake HS in a loser-out game.

Win and advance to the double-elimination bracket.

Address

8651 Meadowbrook Way SE
Snoqualmie, WA
98065

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