diff --git a/.github/workflows/build_workflow.yml b/.github/workflows/build_workflow.yml
index fb6af7f8a..91942e69c 100644
--- a/.github/workflows/build_workflow.yml
+++ b/.github/workflows/build_workflow.yml
@@ -16,6 +16,11 @@ on:
 env:
   CANCEL_OTHERS: false
   PATHS_IGNORE: '["**/README.md", "**/docs/**"]'
+  # mpich >=5 is built as ch4:ucx,ofi, so UCX is the default netmod.  Azure-hosted
+  # GitHub runners expose a MANA RDMA device that UCX tries (and fails) to open,
+  # so MPI_Init() aborts inside ESMF_RegridWeightGen.  Restrict UCX to transports
+  # that actually work on the runners.
+  UCX_TLS: "tcp,self,sm"
 
 jobs:
   build:
@@ -25,9 +30,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - python-version: "3.10"
-            pixi-environment: py310
-            variant-file: ci/python3.10.yaml
           - python-version: "3.11"
             pixi-environment: py311
             variant-file: ci/python3.11.yaml
@@ -83,9 +85,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - python-version: "3.10"
-            pixi-environment: py310
-            variant-file: ci/python3.10.yaml
           - python-version: "3.11"
             pixi-environment: py311
             variant-file: ci/python3.11.yaml
diff --git a/ci/python3.10.yaml b/ci/python3.10.yaml
deleted file mode 100644
index ba317ae3c..000000000
--- a/ci/python3.10.yaml
+++ /dev/null
@@ -1,8 +0,0 @@
-channel_sources:
-- conda-forge
-pin_run_as_build:
-  python:
-    min_pin: x.x
-    max_pin: x.x
-python:
-- 3.10.* *_cpython
diff --git a/ci/recipe/recipe.yaml b/ci/recipe/recipe.yaml
index 8997328a2..380593b76 100644
--- a/ci/recipe/recipe.yaml
+++ b/ci/recipe/recipe.yaml
@@ -3,7 +3,7 @@ schema_version: 1
 context:
   name: MPAS-Analysis
   version: "1.15.0"
-  python_min: "3.10"
+  python_min: "3.11"
 
 package:
   name: ${{ name|lower }}
@@ -39,7 +39,7 @@ requirements:
     - lxml
     - mache >=1.11.0
     - matplotlib-base >=3.9.0
-    - mpas_tools >=1.3.0,<2.0.0
+    - mpas_tools >=2.0.0,<3.0.0
     - nco >=4.8.1,!=5.2.6,!=5.3.7
     - netcdf4
     - numpy >=2.0,<3.0
diff --git a/dev-spec.txt b/dev-spec.txt
index b6fda53a5..4328f2d9d 100644
--- a/dev-spec.txt
+++ b/dev-spec.txt
@@ -2,7 +2,7 @@
 # $ conda create --name <env> --file <this file>
 
 # Base
-python >=3.10
+python >=3.11
 cartopy >=0.18.0
 cartopy_offlinedata
 cmocean
@@ -15,7 +15,7 @@ gsw
 lxml
 mache >=1.11.0
 matplotlib-base >=3.9.0
-mpas_tools >=1.3.0,<2.0.0
+mpas_tools >=2.0.0,<3.0.0
 nco >=4.8.1,!=5.2.6,!=5.3.7
 netcdf4
 numpy >=2.0,<3.0
@@ -38,8 +38,7 @@ setuptools >=60
 
 # Documentation
 mock
-m2r2 >=0.3.3
-mistune <2
 sphinx
+sphinx-mdinclude >=0.6.2
 sphinx_rtd_theme
 tabulate
diff --git a/docs/conf.py b/docs/conf.py
index 607ca70ed..7047035b3 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -13,7 +13,7 @@
 # serve to show the default.
 
 import os
-import m2r2
+from sphinx_mdinclude import convert
 from glob import glob
 import mpas_analysis.version
 on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
@@ -209,7 +209,8 @@
 for mdFileName in glob('design_docs/*.md'):
     if os.path.basename(mdFileName) == 'template.md':
         continue
-    output = m2r2.parse_from_file(mdFileName)
+    with open(mdFileName, 'r') as inFile:
+        output = convert(inFile.read())
     rstFileName = os.path.splitext(mdFileName)[0]+'.rst'
     with open(rstFileName, 'w') as outFile:
         outFile.write(output)
diff --git a/mpas_analysis/docs/parse_quick_start.py b/mpas_analysis/docs/parse_quick_start.py
index f0691dda9..ae26b7283 100644
--- a/mpas_analysis/docs/parse_quick_start.py
+++ b/mpas_analysis/docs/parse_quick_start.py
@@ -4,7 +4,7 @@
 in the documentation
 """
 
-from m2r2 import convert
+from sphinx_mdinclude import convert
 
 
 def build_quick_start():
diff --git a/pixi.toml b/pixi.toml
index 738e6fd0d..1343103b0 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -4,7 +4,7 @@ name = "mpas-analysis"
 platforms = ["linux-64"]
 
 [dependencies]
-python = ">=3.10"
+python = ">=3.11"
 cartopy = ">=0.18.0"
 cartopy_offlinedata = "*"
 cmocean = "*"
@@ -16,7 +16,7 @@ gsw = "*"
 lxml = "*"
 mache = ">=1.11.0"
 matplotlib-base = ">=3.9.0"
-mpas_tools = ">=1.3.0,<2.0.0"
+mpas_tools = ">=2.0.0,<3.0.0"
 nco = ">=4.8.1,!=5.2.6,!=5.3.7"
 netcdf4 = "*"
 numpy = ">=2.0,<3.0"
@@ -41,19 +41,15 @@ pytest = "*"
 setuptools = ">=60"
 
 [feature.docs.dependencies]
-m2r2 = ">=0.3.3"
-mistune = "<2"
 mock = "*"
 sphinx = "*"
+sphinx-mdinclude = ">=0.6.2"
 sphinx_rtd_theme = "*"
 tabulate = "*"
 
 [feature.build.dependencies]
 rattler-build = "*"
 
-[feature.py310.dependencies]
-python = "3.10.*"
-
 [feature.py311.dependencies]
 python = "3.11.*"
 
@@ -68,7 +64,6 @@ python = "3.14.*"
 
 [environments]
 default = ["dev", "docs", "build"]
-py310 = ["py310", "dev", "docs", "build"]
 py311 = ["py311", "dev", "docs", "build"]
 py312 = ["py312", "dev", "docs", "build"]
 py313 = ["py313", "dev", "docs", "build"]
diff --git a/pyproject.toml b/pyproject.toml
index ffab97d4f..fd4881ef5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,10 +27,9 @@ description = """\
     """
 license = { file = "LICENSE" }
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 classifiers = [
     # these are only for searching/browsing projects on PyPI
-    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
@@ -69,9 +68,8 @@ dependencies = [
 docs = [
     # building documentation
     "mock",
-    "m2r2>=0.3.3",
-    "mistune<2",
     "sphinx",
+    "sphinx-mdinclude>=0.6.2",
     "sphinx_rtd_theme",
     "tabulate",
 ]
diff --git a/suite/run_suite.bash b/suite/run_suite.bash
index 4030c8259..b42119284 100755
--- a/suite/run_suite.bash
+++ b/suite/run_suite.bash
@@ -146,8 +146,9 @@ conda build ci/recipe
 for py in "${main_py}" "${alt_py}"; do
     env="test_mpas_analysis_py${py}"
     conda create -y -n "${env}" --use-local python="${py}" mpas-analysis \
-        sphinx mock sphinx_rtd_theme "tabulate>=0.8.2" "m2r2>=0.3.3" \
-        "mistune<2" pytest "mache>=1.11.0" "esmf=*=mpi_mpich_*" jinja2
+        sphinx mock sphinx_rtd_theme "tabulate>=0.8.2" \
+        "sphinx-mdinclude>=0.6.2" pytest "mache>=1.11.0" \
+        "esmf=*=mpi_mpich_*" jinja2
     conda activate "${env}"
     pytest
     conda deactivate