Mariah Morse is a 26-year-old certified personal trainer and nutritionist who competes in bodybuilding and hails from Coudersport, Pennsylvania. Mariah became famous for being boyfriend Matt Rife, a comedian, between March 2025 and February 2026 but has achieved success in the world of fitness on her own merits.
Who Is Mariah Morse?
Mariah is a professional Personal Trainer and Nutrition Coach who boasts over 240,000 followers on Instagram (@mariahkay_12). In September 2025, Mariah was crowned Bikini Overall Winner at the Summer Shredding Championship. Mariah collaborates with leading fitness companies such as 1st Phorm, Alphalete, and DF
Biography Overview
| Category | Details |
|---|---|
| Full Name | Mariah Morse |
| Age | 26 years old (born July 12, 1999) |
| Birthplace | Coudersport, Pennsylvania, USA |
| Education | Misericordia University, BA in Health Care Administration (2021) |
| Certification | Certified Personal Trainer & Nutrition Coach (2023) |
| Occupation | Personal Trainer, Bodybuilder, Fitness Influencer |
| @mariahkay_12 (240,000+ followers) | |
| Relationship Status | Single (formerly dated Matt Rife) |
| Pet | Alaskan Malamute named Kona |
Age & Early Life
Born July 12, 1999, Mariah is 26 years old. She played soccer, basketball, and track at Milton Area High School, then graduated from Misericordia University in 2021. After working briefly in healthcare, she became a certified personal trainer in 2023.
Physical Appearance
| Attribute | Details |
|---|---|
| Height | 5’6″ (167 cm) |
| Weight | 116 lbs (53 kg) |
| Hair | Blonde |
| Eyes | Brown |
| Body Type | Athletic, muscular (competitive bodybuilder) |
Career Journey
- 2021: Graduated from Misericordia University
- 2023: Became Certified Personal Trainer & Nutrition Coach
- 2024: Built Instagram following, partnered with fitness brands
- September 2025: Won Bikini Overall Winner at Summer Shredding Championship
- 2026: Continuing fitness career independently after breakup
Relationship with Matt Rife
Comedian Matt Rife, dated from March 2025 to February 2026 (about 1 year). Became official on Instagram during her birthday (July 12, 2025). Split up in February 2026; they stopped following each other on their social accounts.
| Relationship Details | Info |
|---|---|
| Duration | 1 year (March 2025 – February 2026) |
| Status | Single |
| Children | None |
Net Worth
Estimated $100,000 – $300,000 from personal training, coaching, brand partnerships, and social media.
Key Facts
- Won Bikini Overall Winner at Summer Shredding Championship (2025)
- Graduated Misericordia University with Health Care Administration degree
- Adopted Alaskan Malamute Kona in 2021
- Favorite things: dog, coffee, gym, family, travel
- Three years younger than Matt Rife
Social Media
| Platform | Handle | Followers |
|---|---|---|
| @mariahkay_12 | 248K followers | |
| Mariah Morse | 667 followers | |
| Mariah Morse | Professional |
Conclusion
She is definitely not an illegitimate fitness personality who relies on associations with famous people because she is highly trained, certified, successful in bodybuilding competitions, and partnered with major companies.
FAQs
How old is Mariah Morse?
26 years old (born July 12, 1999)
Is she still dating Matt Rife?
No, they split in February 2026
What’s her net worth?
$100,000 – $300,000 estimated
Did she win a competition?
Yes, Bikini Overall Winner at Summer Shredding Championship (2025)
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