Colorado Mining Claim Guide

Current 2025 regulations, fees, and filing requirements

← All States

⚡ Quick Facts

State: Colorado
BLM Office: Lakewood
2025 Filing Deadline: September 2, 2025
Maintenance Fee: $200 per claim

📞 BLM Colorado State Office

Address:
Bureau of Land Management - Colorado State Office
2850 Youngfield Street
Lakewood, CO 80215-7093

💰 2025 Fees & Deadlines

Annual Maintenance Fees

  • $200 per lode claim, tunnel site, or mill site
  • $200 per 20 acres (or portion thereof) for placer claims

Critical Deadline

September 2, 2025 - File with BLM by this date

Assessment Work Deadline

December 30, 2025 - For Small Miner's Waiver holders

📮 How to File in Colorado

1. Online (Recommended)

Visit MLRS →

2. By Mail

Mail to the Lakewood address above.

ℹī¸ Colorado State Land Board

For mining claims on Colorado State Land (not federal land), contact:

Colorado State Land Board
Phone: 303-866-3454

🏔ī¸ Popular Mining Counties in Colorado

  • Boulder County
  • Clear Creek County
  • Custer County
  • Gilpin County
  • Lake County
  • Park County
  • San Juan County
  • Summit County
  • Teller County
  • Fremont County

📚 Additional Resources