Mining Lands Administration

Assistance for all matters related to the Mining Lands Administration System (MLAS) is available by calling us toll-free at 1-888-415-9845 (choose the Provincial Recording Office – Option 1). This toll-free line is staffed Monday to Friday from 8:30 a.m. to 5:00 p.m. At any time, clients may leave a voice message and we will return the call in accordance with Ontario’s Quality Service Standard


Learn how to register a mining claim, manage mining claims online, and apply for a prospector’s licence.


Ontario’s mining lands are registered and managed online with the Mining Lands Administration System (MLAS). With MLAS you can:

  • view active unpatented mining claims
  • register a new mining claim
  • manage your mining claims
  • buy or renew your prospector’s licence

Anyone can use the MLAS Map Viewer to view active, unpatented mining claims in Ontario. However, if you want to register a new mining claim or manage a mining claim, you must register for an MLAS user account and hold a valid prospector’s licence. 

Access MLAS

Login to MLAS (registered users)

Login to MLAS if you have already registered

Login to MLAS

MLAS Map Viewer (non-registered users)

Use the MLAS Map Viewer to view active unpatented mining claims. Registration is not required.

Launch MLAS Map Viewer

Register for MLAS

There are three steps to follow to register for MLAS:

  1. Create an Ontario ONe-key ID
    ONe-key is a secure account that gives you online access to Ontario government programs and services. Once you have a ONe-key ID, you can create your MLAS user account. 

    Create your ONe-key ID
  2. Create an MLAS user account
    Log into ONe-key and choose Mining Lands Administration System (MLAS) from the list of services to begin setting up your MLAS user account.

    Step-by-step guide to creating your MLAS user account
  3. Have a valid prospector’s licence
    If you do not already have a prospector’s licence you can apply for one in MLAS once you have your MLAS user account.

    How to sign up or renew your prospector’s licence

Guides and resources

Minister’s directives

Information about how to use MLAS:

  1. Getting started with MLAS
  2. Obtaining a prospector’s licence
  3. Registering a mining claim
  4. Claim management
  5. Assessment work reporting
  6. Early exploration activities

How-to videos and guides

Step-by-step videos to help you use MLAS:

  1. Register as an existing legacy client
  2. Register as a new client
  3. Apply for a prospector’s licence in MLAS
  4. View or print a prospector’s licence
  5. Register a mining claim
  6. Initiate the transfer of a mining claim
  7. Complete the transfer of a mining claim
  8. Confirm Surface Rights Owner (SRO) notification of claim registration
  9. Distribute approved credits
  10. Manage agents
  11. Submit a notice of claim abandonment

Step-by-step guides to help you use MLAS:

  1. What to do if you forget your ONe-key username and password

Fact Sheets

Get email updates

Contact us

If you need help with MLAS:

  • call us Monday to Friday from 8:30 a.m. to 5:00 p.m. EST at 1-888-415-9845 (choose option 1 for the Provincial Recording Office).
  • email us at