diff --git a/Earthfile b/Earthfile
index 88b1851e8..a92cfc2dd 100644
--- a/Earthfile
+++ b/Earthfile
@@ -35,7 +35,7 @@ save:
     BUILD +save-mbtiles --area=${area}
     IF [ ! -z "${transit_feeds}" ]
         BUILD +save-gtfs --area=${area} --transit_feeds=${transit_feeds}
-        BUILD +save-otp --area=${area} --transit_feeds=${transit_feeds} --clip_to_gtfs=0
+        BUILD +save-otp-graph --area=${area} --transit_feeds=${transit_feeds} --clip_to_gtfs=0
     END
     BUILD +save-valhalla --area=${area}
     BUILD +save-pelias --area=${area} --countries=${countries}
@@ -98,14 +98,15 @@ save-gtfs:
 save-otp-zones:
     FROM +save-base
     ARG --required area
+    # List of filenames. Each file corresponds to an OTP graph to output. Each row in each file references a GTFS feeds input to that OTP graph.
     ARG --required transit_zones
     ARG otp_build_config
     FOR transit_feeds IN $transit_zones
-        BUILD +save-otp --area=${area} --transit_feeds=${transit_feeds} --clip_to_gtfs=1 --otp_build_config=${otp_build_config}
+        BUILD +save-otp-graph --area=${area} --transit_feeds=${transit_feeds} --clip_to_gtfs=1 --otp_build_config=${otp_build_config}
         BUILD +save-otp-router-config --transit_feeds=${transit_feeds}
     END
 
-save-otp:
+save-otp-graph:
     FROM +save-base
     ARG --required area
     ARG --required transit_feeds
@@ -128,7 +129,7 @@ save-otp:
     COPY +cache-buster/todays_date .
     ARG cache_key=$(cat todays_date)
 
-    COPY (+otp-build/graph.obj --area=${area} \
+    COPY (+otp-build-graph/graph.obj --area=${area} \
                                --clip_to_gtfs=${clip_to_gtfs} \
                                --transit_feeds=${transit_feeds} \
                                --cache_key=${cache_key} \
@@ -517,7 +518,7 @@ otp-base:
 
     RUN mkdir /var/opentripplanner
 
-otp-build:
+otp-build-graph:
     FROM +otp-base
 
     ARG --required area
@@ -542,20 +543,54 @@ otp-build:
         COPY "${otp_build_config}" /var/opentripplanner/build-config.json
     END
 
+    # Note: This bounds all directions to the extent of the transit feeds, so e.g. you can't get OTP
+    # bike routing anywhere outside the bounds of the transit feeds. This should usually be fine, but it'd
+    # be nice to handle the case where someone wants biking outside of their transit graph bbox.
+    COPY (+gtfs-compute-bbox/bbox.txt --transit_feeds=${transit_feeds} --cache_key=${cache_key}) bbox.txt
+    ARG gtfs_bbox=$(cat bbox.txt)
+
     IF [ -n "$clip_to_gtfs" ]
-        COPY (+gtfs-compute-bbox/bbox.txt --transit_feeds=${transit_feeds} --cache_key=${cache_key}) bbox.txt
-        ARG clip_bbox=$(cat bbox.txt)
-        COPY (+extract/data.osm.pbf --area=${area} --clip_bbox=${clip_bbox}) /var/opentripplanner
+        COPY (+extract/data.osm.pbf --area=${area} --clip_bbox=${gtfs_bbox}) /var/opentripplanner
     ELSE
         COPY (+extract/data.osm.pbf --area=${area}) /var/opentripplanner
     END
 
+    COPY (+elevation/elevation-tifs --bbox=${gtfs_bbox}) /var/opentripplanner
+
     COPY (+gtfs-build/gtfs --transit_feeds=${transit_feeds} --cache_key=${cache_key}) /var/opentripplanner
 
     RUN --entrypoint -- --build --save
 
     SAVE ARTIFACT /var/opentripplanner/graph.obj /graph.obj
 
+download-elevation:
+    FROM +valhalla-base-image
+
+    # e.g. '-122.462 47.394 -122.005 47.831'
+    # Note: this is the bbox format we use everywhere, but we need to convert it to the comma separated one that valhalla uses
+    ARG --required bbox
+
+    ARG valhalla_bbox=$(echo ${bbox} | sed 's/ /,/g')
+    RUN valhalla_build_elevation --outdir elevation-hgts --from-bbox=${valhalla_bbox}
+
+    SAVE ARTIFACT elevation-hgts
+
+elevation:
+    FROM debian:bookworm-slim
+    ARG --required bbox
+
+    RUN apt-get update \
+        && apt-get install -y --no-install-recommends gdal-bin \
+        && rm -rf /var/lib/apt/lists/*
+
+    COPY services/otp/dem-hgt-to-tif .
+
+    COPY (+download-elevation/elevation-hgts --bbox=${bbox}) elevation-hgts/
+
+    RUN ./dem-hgt-to-tif elevation-hgts elevation-tifs
+
+    SAVE ARTIFACT elevation-tifs
+
 otp-init-image:
     FROM +downloader-base
     COPY ./services/otp/init.sh /app/init.sh
diff --git a/services/otp/dem-hgt-to-tif b/services/otp/dem-hgt-to-tif
new file mode 100755
index 000000000..b9f7b9eaa
--- /dev/null
+++ b/services/otp/dem-hgt-to-tif
@@ -0,0 +1,22 @@
+#!/bin/bash -ex
+
+HGT_DIR=$1
+if [ -z "$HGT_DIR" ]; then
+    echo "Missing param for input directory of .hgt files"
+    exit 1
+fi
+
+TIF_DIR=$2
+if [ -z "$TIF_DIR" ]; then
+    echo "Missing param for output directory of .tif files"
+    exit 1
+fi
+
+mkdir "$TIF_DIR"
+
+find "$HGT_DIR" -type f | while read -r file; do
+    gunzip "$file"
+    BASENAME=$(basename "$file")
+    TIF_NAME="${BASENAME%.*.*}.tif"
+    gdal_translate "${file%.*}" "${TIF_DIR}/${TIF_NAME}"
+done