diff --git a/packages/cli/src/networks/ephemery.ts b/packages/cli/src/networks/ephemery.ts
new file mode 100644
index 000000000000..f3d2dcacd7f1
--- /dev/null
+++ b/packages/cli/src/networks/ephemery.ts
@@ -0,0 +1,8 @@
+export {ephemeryChainConfig as chainConfig} from "@lodestar/config/networks";
+
+export const depositContractDeployBlock = 0;
+export const genesisFileUrl = "https://ephemery.dev/latest/genesis.ssz";
+export const bootnodesFileUrl = "https://ephemery.dev/latest/bootstrap_nodes.txt";
+
+// Pick from above file
+export const bootEnrs = [];
diff --git a/packages/cli/src/networks/index.ts b/packages/cli/src/networks/index.ts
index a44575b94351..85846164b473 100644
--- a/packages/cli/src/networks/index.ts
+++ b/packages/cli/src/networks/index.ts
@@ -18,8 +18,18 @@ import * as ropsten from "./ropsten.js";
 import * as sepolia from "./sepolia.js";
 import * as holesky from "./holesky.js";
 import * as chiado from "./chiado.js";
-
-export type NetworkName = "mainnet" | "dev" | "gnosis" | "goerli" | "ropsten" | "sepolia" | "holesky" | "chiado";
+import * as ephemery from "./ephemery.js";
+
+export type NetworkName =
+  | "mainnet"
+  | "dev"
+  | "gnosis"
+  | "goerli"
+  | "ropsten"
+  | "sepolia"
+  | "holesky"
+  | "chiado"
+  | "ephemery";
 export const networkNames: NetworkName[] = [
   "mainnet",
   "gnosis",
@@ -28,6 +38,7 @@ export const networkNames: NetworkName[] = [
   "sepolia",
   "holesky",
   "chiado",
+  "ephemery",
 
   // Leave always as last network. The order matters for the --help printout
   "dev",
@@ -69,6 +80,8 @@ export function getNetworkData(network: NetworkName): {
       return holesky;
     case "chiado":
       return chiado;
+    case "ephemery":
+      return ephemery;
     default:
       throw Error(`Network not supported: ${network}`);
   }
diff --git a/packages/config/src/chainConfig/networks/ephemery.ts b/packages/config/src/chainConfig/networks/ephemery.ts
new file mode 100644
index 000000000000..c338c26f2cf3
--- /dev/null
+++ b/packages/config/src/chainConfig/networks/ephemery.ts
@@ -0,0 +1,61 @@
+/* eslint-disable @typescript-eslint/naming-convention */
+import {fromHexString as b} from "@chainsafe/ssz";
+import {ChainConfig} from "../types.js";
+import {chainConfig as mainnet} from "../presets/mainnet.js";
+
+// Ephemery dynamic beacon chain config:
+// https://github.com/ephemery-testnet/ephemery-genesis/blob/master/cl-config.yaml
+
+// Ephemery specification:
+// https://github.com/taxmeifyoucan/EIPs/blob/d298cdd8eaf47a21e7770e5c6efef870587c924d/EIPS/eip-6916.md
+
+// iteration 0, "base"-genesis
+const baseChainConfig: ChainConfig = {
+  ...mainnet,
+
+  CONFIG_NAME: "ephemery",
+
+  // Genesis
+  // ---------------------------------------------------------------
+  MIN_GENESIS_ACTIVE_VALIDATOR_COUNT: 64,
+  // Thu Dec 02 2021 19:00:00 GMT+0000
+  MIN_GENESIS_TIME: 1638471600,
+  GENESIS_FORK_VERSION: b("0x1000101b"),
+  GENESIS_DELAY: 300,
+
+  // Forking
+  // ---------------------------------------------------------------
+  // Altair
+  ALTAIR_FORK_VERSION: b("0x2000101b"),
+  ALTAIR_FORK_EPOCH: 0,
+  // Merge
+  BELLATRIX_FORK_VERSION: b("0x3000101b"),
+  BELLATRIX_FORK_EPOCH: 0,
+  TERMINAL_TOTAL_DIFFICULTY: BigInt("0"),
+  // Capella
+  CAPELLA_FORK_VERSION: b("0x4000101b"),
+  CAPELLA_FORK_EPOCH: 0,
+  // Deneb
+  DENEB_FORK_VERSION: b("0x5000101b"),
+
+  // Deposit contract
+  // ---------------------------------------------------------------
+  DEPOSIT_CHAIN_ID: 39438000,
+  DEPOSIT_NETWORK_ID: 39438000,
+  DEPOSIT_CONTRACT_ADDRESS: b("0x4242424242424242424242424242424242424242"),
+
+  ETH1_FOLLOW_DISTANCE: 12,
+};
+
+// Reset interval (7 days) in milliseconds, based on ephemery-genesis values.env:
+// https://github.com/ephemery-testnet/ephemery-genesis/blob/9a28fbef950c8547d78785f8a0ea49a95ce19a48/values.env#L5
+const RESET_INTERVAL_MS = 604800000;
+const iteration = Math.floor(Date.now() - baseChainConfig.MIN_GENESIS_TIME) / RESET_INTERVAL_MS;
+
+export const ephemeryChainConfig: ChainConfig = {
+  ...baseChainConfig,
+
+  MIN_GENESIS_TIME: RESET_INTERVAL_MS * iteration + baseChainConfig.MIN_GENESIS_TIME,
+  DEPOSIT_CHAIN_ID: baseChainConfig.DEPOSIT_CHAIN_ID + iteration,
+  DEPOSIT_NETWORK_ID: baseChainConfig.DEPOSIT_NETWORK_ID + iteration,
+};
diff --git a/packages/config/src/networks.ts b/packages/config/src/networks.ts
index e9d549fa1e75..8ff3cdd15256 100644
--- a/packages/config/src/networks.ts
+++ b/packages/config/src/networks.ts
@@ -6,6 +6,7 @@ import {ropstenChainConfig} from "./chainConfig/networks/ropsten.js";
 import {sepoliaChainConfig} from "./chainConfig/networks/sepolia.js";
 import {holeskyChainConfig} from "./chainConfig/networks/holesky.js";
 import {chiadoChainConfig} from "./chainConfig/networks/chiado.js";
+import {ephemeryChainConfig} from "./chainConfig/networks/ephemery.js";
 
 export {
   mainnetChainConfig,
@@ -15,9 +16,10 @@ export {
   sepoliaChainConfig,
   holeskyChainConfig,
   chiadoChainConfig,
+  ephemeryChainConfig,
 };
 
-export type NetworkName = "mainnet" | "gnosis" | "goerli" | "ropsten" | "sepolia" | "holesky" | "chiado";
+export type NetworkName = "mainnet" | "gnosis" | "goerli" | "ropsten" | "sepolia" | "holesky" | "chiado" | "ephemery";
 export const networksChainConfig: Record<NetworkName, ChainConfig> = {
   mainnet: mainnetChainConfig,
   gnosis: gnosisChainConfig,
@@ -26,6 +28,7 @@ export const networksChainConfig: Record<NetworkName, ChainConfig> = {
   sepolia: sepoliaChainConfig,
   holesky: holeskyChainConfig,
   chiado: chiadoChainConfig,
+  ephemery: ephemeryChainConfig,
 };
 
 export type GenesisData = {
@@ -62,4 +65,8 @@ export const genesisData: Record<NetworkName, GenesisData> = {
     genesisTime: 1665396300,
     genesisValidatorsRoot: "0x9d642dac73058fbf39c0ae41ab1e34e4d889043cb199851ded7095bc99eb4c1e",
   },
+  ephemery: {
+    genesisTime: ephemeryChainConfig.MIN_GENESIS_TIME + ephemeryChainConfig.GENESIS_DELAY,
+    genesisValidatorsRoot: "0x0000000000000000000000000000000000000000000000000000000000000000",
+  },
 };
diff --git a/packages/prover/src/utils/execution.ts b/packages/prover/src/utils/execution.ts
index dcab3d7d7fb4..083f15e1e5dd 100644
--- a/packages/prover/src/utils/execution.ts
+++ b/packages/prover/src/utils/execution.ts
@@ -46,6 +46,7 @@ export function getChainCommon(network: string): Common {
     case "ropsten":
     case "sepolia":
     case "holesky":
+    case "ephemery":
       // TODO: Not sure how to detect the fork during runtime
       return new Common({chain: network, hardfork: Hardfork.Shanghai});
     case "minimal":