Mekong Deprecation Announcement

Ethereum’s Mekong testnet that was originally launched for wallet UX testing and validator prep for the Pectra upgrade is being deprecated on March 7th, 2025. With Pectra now active on Sepolia and Holesky, Mekong’s purpose has been fulfilled.

Key Insights

Sepolia is now the go-to environment for wallet developers and smart contract testing.
Holesky remains relevant for validator and staking operations linked to Pectra.
Mekong will be phased out, signaling developers to update testing pipelines accordingly.