Looking for logging into the Salesforce Training Org site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Salesforce Training Org site. After that you can login as usual with your login credentials.
https://www.salesforce.com/form/signup/freetrial_training/
https://login.salesforce.com/?locale=de
https://developer.salesforce.com/forums/?id=9060G000000I8bEQAS
https://success.salesforce.com/answers?id=90630000000hBlaAAE
https://partners.salesforce.com/s/education/general/Training
https://trailhead.salesforce.com/
https://developer.salesforce.com/signup
https://success.salesforce.com/apex/answers?id=90630000000CtLSAA0
https://success.salesforce.com/issues_view?id=a1p3A000000IYdVQAW
https://help.salesforce.com/HTViewSolution?id=000171110
https://trailhead.salesforce.com/en/content/learn/modules/identity_login/identity_login_my_domain
https://salesforce.stackexchange.com/questions/219282/my-salesforce-training-account-has-expired-now-i-can-not-login-to-trailhead-can
https://intellipaat.com/tutorial/salesforce-tutorial/creating-salesforce-developer-account/