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To find a federal climate lawsuit, search the court’s own docket if you know where it was filed; otherwise, start with PACER’s nationwide Case Locator. For a U.S. Supreme Court case, search the Court’s official docket by case name or docket number, then use the envelope icon on the case page to sign up for email updates.

Find the court and case number

Federal district courts and courts of appeals use PACER and their CM/ECF systems for public case records. If you know the court, use its search page: PACER says information from a specific court is updated immediately. If you do not know the filing court, search the PACER Case Locator, a nationwide index updated daily. You need a PACER account to access federal case records.

  1. Search the likely court or nationwide index. The Case Locator can search by party, case number, nature of suit, and date fields. Its results include basic details such as the court, case number, and filing date. If you cannot find a party in the Locator, PACER advises contacting the federal court where you believe the case was filed. See PACER’s Case Locator help.
  2. Record the court and case number. Search by the case number once you have it; common party names can match unrelated cases. PACER’s help explains searches by case number and party name.
  3. Open the detailed docket. Follow the Locator result to the court’s CM/ECF record. Read the docket text and open the underlying document when it is available. Some courts offer RSS feeds that summarize activity and link to the document and docket report; opening those records still requires PACER login.

Search and follow a Supreme Court case

Use the U.S. Supreme Court’s Docket Search with a case caption, docket number, or words that appear in a docket report. The system provides complete status information for cases filed since the beginning of the 2001 Term.

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  1. Search by the case name or docket number and open the individual case page.
  2. Read the docket chronologically to see filings and court action. The Court says its docket system includes electronic images of most submissions filed after November 13, 2017.
  3. Select the envelope icon on the case page and complete the email confirmation step to receive notifications of new filings or court action. The Court says users can sign up for email notifications of activity in pending cases.

An alert is a prompt to check the docket, not a substitute for reading it. For lower federal courts, check the specific court’s CM/ECF page to see whether it offers an RSS feed; availability varies by court.

Read docket entries without mistaking them for rulings

A docket is the chronological record of submissions and court actions. A new entry does not necessarily mean the court has decided the case. Distinguish among party briefs, motions, orders, and opinions. A brief is a party’s argument; a motion asks the court to take an action; an order is a court ruling, often resolving a motion or petition; an opinion gives the court’s explanation of a decision.

Open the linked document when possible, since a short docket description may not convey the filing’s full meaning. Attribute claims in briefs to the party that filed them rather than treating those arguments as judicial findings.

Example: Boulder County v. Suncor at the Supreme Court

The Supreme Court docket for County Commissioners of Boulder County v. Suncor Energy (U.S.A.) Inc., No. 25-170, shows how to track a case from one filing to the next. The Court granted the petition on February 23, 2026, and directed the parties to brief and argue an additional question: “Whether this Court has statutory and Article III jurisdiction to hear this case.” The petitioners’ merits brief was filed May 14, 2026, and the respondents’ brief was filed July 27, 2026. The Court set oral argument for October 5, 2026. The latest entry listed as of October 3, 2026, was a September 28 clerk’s letter to counsel noting that Justice Alito would not continue to participate in the case.

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These are docket events and scheduling information, not a prediction of the result. The merits brief is a party filing: descriptions of the dispute or arguments in it should be understood as the petitioners’ position, not a finding by the Court. Check the live Supreme Court docket for No. 25-170 for the current record.

Know which records this process covers

This workflow covers federal cases and the U.S. Supreme Court. State trial and appellate courts maintain separate docket systems, so for a state-court climate lawsuit, use the relevant state court’s official portal.

PACER transcripts follow a separate access timeline: they are added to PACER 90 days after they are produced. During that period, contact the clerk’s office for information about inspecting a copy or obtaining one from the reporter or transcriber. This delay concerns transcripts, not ordinary docket entries.

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Choose the right search and alert method

Need Best starting point What to expect
Know the federal court That court’s PACER/CM/ECF search Information is updated immediately, according to PACER.
Do not know the federal court PACER Case Locator Nationwide results are updated daily; use them to identify the court and case number.
Track a Supreme Court case Supreme Court Docket Search and case page Search by caption or docket number; case-specific email notifications are available.
Track a lower federal court case automatically The court’s CM/ECF RSS option, if offered RSS is court-dependent; feeds link back to PACER records.

Before relying on a docket entry for a report or update, revisit the official case page. The nationwide Locator updates daily, while a specific court’s information is updated immediately, and filings or hearing schedules can change.

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