Mining Lands Administration


Please be advised that an outage to MLAS is scheduled from MARCH 2 AT 8:45 PM TO MARCH 2 AT 11:59 PM EST.

You will not be able to access MLAS during this time.

Please contact the Provincial Recording Office at 1-888-415-9845 if you have further questions.

In the April 17, 2020, ENDM Bulletin, the ministry acknowledged that the COVID-19 outbreak and related public health requirements are special circumstances that have created challenges for all claim holders in Ontario. Given the present uncertainty over when current health and safety measures will ease, we acknowledge that some claim holders may be having difficulty planning work programs. We are aware that exclusions may help promote public safety, particularly in remote areas, as they would reduce the need for travel into those areas for purposes of exploration. As a result, we will continue to offer a streamlined process for processing requests for COVID-19 related exclusion orders under the Mining Act and for all claim holders with anniversary dates on or before July 31, 2021.

Claim holders with claim anniversary dates on or before July 31, 2021, will be given an exclusion order if they make a brief request via email citing COVID-19 as the reason the exclusion order is requested. There will be no cost for COVID-19 related exclusion requests. The exclusion orders will remove the requirement to perform and file assessment work for a period of time of up to 12 months.

To obtain an exclusion order, claim holders or their authorized agents must email the Provincial Recording Office at no earlier than the 30th day before the anniversary date of your claim and no later than 4:30 PM Eastern time on the anniversary date. For more information, please see this bulletin.


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