2025 4K Trail Run

Join us on Wednesday, May 21st or Thursday, May 22nd for the most unique race in Boston!

You can register as an individual runner below, or as part of a corporate team. If your corporate team is already registered, please contact your Team Captain for your registration link. If your corporate team has not yet registered, please contact sponsorships@cathleenstoneisland.org.

Individual Registration

Friend of the island or a fan of the race looking to join this year's trail run? Register yourself as an individual to run on Wednesday, May 21st or Thursday, May 22nd. The deadline to register is Friday, May 9, 2025.

Corporate Team Registration

Every team has a unique registration link. If your team has already registered, please reach out to your Team Captain for your registration link. If your team has not registered yet, contact sponsorships@cathleenstoneisland.org to register today. The deadline to register is Friday, May 9, 2025.

Increase Your Impact

Support this year's annual fundraising campaign!
Runners and teams can make a direct impact on Boston's youth by completing their own fundraising campaign. Plus, fundraisers have a chance to win some great prizes!

Peer to Peer - Learn More

$15,120

Raised of $85,000

$85,000

4K Trail Run

2025 4K Trail Run

You can register as an individual runner below, or as part of a corporate team. If your corporate team is already registered, please contact your Team Captain for your registration link. If your corporate team has not yet registered, please contact sponsorships@cathleenstoneisland.org.

Individual Registration

Corporate Team Registration

Increase Your Impact

Support this year's annual fundraising campaign!
Runners and teams can make a direct impact on Boston's youth by completing their own fundraising campaign. Plus, fundraisers have a chance to win some great prizes!

$15,120

Raised of $85,000

Presenting Sponsor

Champion Sponsor

Elite Sponsor

Winning Sponsor

Competitive Sponsor

Race Sponsor

In Kind Supporter

4K Trail Run

2025 4K Trail Run

You can register as an individual runner below, or as part of a corporate team. If your corporate team is already registered, please contact your Team Captain for your registration link. If your corporate team has not yet registered, please contact sponsorships@cathleenstoneisland.org.

Individual Registration

Corporate Team Registration

Increase Your Impact

Support this year's annual fundraising campaign!Runners and teams can make a direct impact on Boston's youth by completing their own fundraising campaign. Plus, fundraisers have a chance to win some great prizes!

$15,120

Raised of $85,000

Presenting Sponsor

Champion Sponsor

Elite Sponsor

Winning Sponsor

Competitive Sponsor

Race Sponsor

In Kind Supporter

Support this year's annual fundraising campaign!
Runners and teams can make a direct impact on Boston's youth by completing their own fundraising campaign. Plus, fundraisers have a chance to win some great prizes!