diff --git a/.coin-or/projDesc.xml b/.coin-or/projDesc.xml
index b5da0efb6fa..818e3ab69c8 100644
--- a/.coin-or/projDesc.xml
+++ b/.coin-or/projDesc.xml
@@ -227,8 +227,8 @@ Carl D. Laird, Chair, Pyomo Management Committee, claird at andrew dot cmu dot e
 			     Use explicit overrides to disable use of automated
 			     version reporting.
 			-->
-			<stableVersionNumber>6.8.2</stableVersionNumber>
-			<releaseNumber>6.8.2</releaseNumber>
+			<stableVersionNumber>6.9.0</stableVersionNumber>
+			<releaseNumber>6.9.0</releaseNumber>
 
 		</developmentStatus>
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f68e827a92..b362f93880a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,44 @@
 Pyomo CHANGELOG
 ===============
 
+-------------------------------------------------------------------------------
+Pyomo 6.9.0   (21 Feb 2025)
+-------------------------------------------------------------------------------
+
+- General
+  - Big Wheel of Misfortune - A Practice in Reviewing Old Issues (#3460, #3473)
+  - Resolve buffering issues in `TeeStream` and `capture_output` (#3449)
+  - Update GHA badges on README.md (#3457)
+  - Fix incompatibility with `imp` and `DeferredImportCallbackFinder` (#3444)
+  - Remove Python 3.8 Support (#3438)
+- Core
+  - Resolve error parenthesizing pow mantissa (#3472)
+  - Resolve OSX error accessing closed filehandle (#3467)
+  - Allow construction of CUID from another CUID (#3464)
+  - Clean up `identify_variables` / `identify_mutable_parameters`; 
+    deprecate `SimpleExpressionVisitor` (#3436)
+- Solver Interfaces
+  - Solver refactor: BUGFIX, f-string in contrib/solver (#3481)
+  - Update Gurobi NL interface for Gurobi 12.x (#3470)
+  - Defer starting the SAS session until needed (#3448)
+  - Solver refactor: Validator for `tee` in `contrib.solver.config` (#3482)
+- Testing
+  - Pin Sphinx to not 8.2.0 (#3479)
+  - Typos corrections (#3437, #3474)
+  - Address intermittent TeeStream test failure (#3465)
+  - 2025 Testing update: Black 25.1.0, testing Qt without X11 (#3463)
+  - Testing: exclude Xpress 9.5.1 on Windows/GHA/Python3.{0,1} (#3455)
+  - CY25 CI Infrastructure and typo fixes (#3453)
+  - Verify we are testing all NEOS solvers (#3433)  
+- Contributed Packages
+  - GDPOpt: Add Logic-Based Discrete-Steepest Descent Algorithm (#3331)
+  - PyROS: Fix/Tweak Documentation and Solver Output Logging (#3475)
+  - PyROS: Fix Treatment of Fixed Model Variables and Initialization of 
+           Auxiliary Uncertain Parameters (#3461)
+  - PyROS: Improve handling of separation problem sub-solver errors (#3441)
+  - PyROS: Extend valid types for solver argument `uncertain_params` (#3439)
+  - PyROS: Add Gaussian confidence level attribute to `EllipsoidalSet` (#3434)
+
 -------------------------------------------------------------------------------
 Pyomo 6.8.2   (18 Nov 2024)
 -------------------------------------------------------------------------------
diff --git a/RELEASE.md b/RELEASE.md
index 34301a529f0..cc9c01c234f 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,20 +1,14 @@
-We are pleased to announce the release of Pyomo 6.8.2.
+We are pleased to announce the release of Pyomo 6.9.0.
 
 Pyomo is a collection of Python software packages that supports a
 diverse set of optimization capabilities for formulating and analyzing
 optimization models.
 
-The following are highlights of the 6.8 release series:
+The following are highlights of the 6.9 release series:
 
-- Complete Documentation Reorganization
-- Added support for Python 3.13
-- Refactor default Gurobi interface to support version 12
-- Support for NumPy2
-- Refactor of Design of Experiments (`contrib.doe`)
-- New packages:
-  - alternative_solutions: alternative (near) optimal solutions
+- Removed support for Python 3.8
+- New Logic-Based Discrete-Steepest Descent Algorithm in GDPOpt
 - New solver interfaces:
-  - SAS: Statistical Analysis System
   - v2: Ongoing solver interface refactor
 - ...and of course numerous minor bug fixes and performance enhancements
 
diff --git a/pyomo/core/expr/visitor.py b/pyomo/core/expr/visitor.py
index 98da9fb963e..f7478104be9 100644
--- a/pyomo/core/expr/visitor.py
+++ b/pyomo/core/expr/visitor.py
@@ -682,7 +682,7 @@ def _nonrecursive_walker_loop(self, ptr):
 @deprecated(
     "The SimpleExpressionVisitor is deprecated.  "
     "Please use the StreamBasedExpressionVisitor instead.",
-    version='6.9.0.dev0',
+    version='6.9.0',
 )
 class SimpleExpressionVisitor(object):
     """
diff --git a/pyomo/version/info.py b/pyomo/version/info.py
index ee37183cd4a..007fc390fbf 100644
--- a/pyomo/version/info.py
+++ b/pyomo/version/info.py
@@ -27,8 +27,8 @@
 major = 6
 minor = 9
 micro = 0
-releaselevel = 'invalid'
-# releaselevel = 'final'
+# releaselevel = 'invalid'
+releaselevel = 'final'
 serial = 0
 
 if releaselevel == 'final':