diff --git a/crates/litesvm/src/features.rs b/crates/litesvm/src/features.rs
index 2fb422d7..9ea89634 100644
--- a/crates/litesvm/src/features.rs
+++ b/crates/litesvm/src/features.rs
@@ -1,7 +1,7 @@
 use solana_address::Address;
 
 /// Feature gates currently activated on Solana mainnet-beta, paired with their
-/// activation slot, sourced from the cluster on 2026-10-15.
+/// activation slot, sourced from the cluster on 2026-10-26.
 pub const MAINNET_ACTIVE_FEATURES: &[(Address, u64)] = &[
     (agave_feature_set::deprecate_rewards_sysvar::ID, 55728001),
     (agave_feature_set::pico_inflation::ID, 57456000),
@@ -636,6 +636,7 @@ pub const MAINNET_ACTIVE_FEATURES: &[(Address, u64)] = &[
         agave_feature_set::formalize_loaded_transaction_data_size::ID,
         381888000,
     ),
+    (agave_feature_set::alpenglow::ID, 459648000),
     (
         agave_feature_set::disable_zk_elgamal_proof_program::ID,
         347760000,
diff --git a/crates/litesvm/tests/feature_accounts.rs b/crates/litesvm/tests/feature_accounts.rs
index 8e4b16c2..0949933c 100644
--- a/crates/litesvm/tests/feature_accounts.rs
+++ b/crates/litesvm/tests/feature_accounts.rs
@@ -1,5 +1,4 @@
 use {
-    agave_feature_set::{accounts_lt_hash, alpenglow, raise_cpi_nesting_limit_to_8},
     litesvm::{features::MAINNET_ACTIVE_FEATURES, LiteSVM},
     solana_feature_gate_interface::{self as feature_gate, Feature},
 };
@@ -7,56 +6,49 @@ use {
 #[test_log::test]
 fn new_initializes_accounts_for_enabled_features() {
     let svm = LiteSVM::new();
-    let feature_id = accounts_lt_hash::id();
+    for (feature_id, activation_slot) in MAINNET_ACTIVE_FEATURES {
+        let account = svm
+            .get_account(feature_id)
+            .unwrap_or_else(|| panic!("active feature account {feature_id} should exist"));
+        let feature =
+            feature_gate::from_account(&account).expect("feature account should deserialize");
 
-    let account = svm
-        .get_account(&feature_id)
-        .expect("active feature account should exist");
-    let feature = feature_gate::from_account(&account).expect("feature account should deserialize");
-
-    let expected_slot = MAINNET_ACTIVE_FEATURES
-        .iter()
-        .find(|(id, _)| *id == feature_id)
-        .map(|(_, slot)| *slot)
-        .expect("accounts_lt_hash should be in the active feature list");
-
-    assert_eq!(account.owner, solana_sdk_ids::feature::id());
-    assert_eq!(
-        feature,
-        Feature {
-            activated_at: Some(expected_slot)
-        }
-    );
-    assert!(
-        account.lamports >= svm.minimum_balance_for_rent_exemption(Feature::size_of()),
-        "feature account should be rent exempt"
-    );
+        assert_eq!(account.owner, solana_sdk_ids::feature::id(), "{feature_id}");
+        assert_eq!(
+            feature,
+            Feature {
+                activated_at: Some(*activation_slot)
+            },
+            "{feature_id}"
+        );
+        assert!(
+            account.lamports >= svm.minimum_balance_for_rent_exemption(Feature::size_of()),
+            "feature account {feature_id} should be rent exempt"
+        );
+    }
 }
 
 #[test_log::test]
 fn new_does_not_initialize_accounts_for_inactive_mainnet_features() {
     let svm = LiteSVM::new();
-    assert!(
-        svm.get_account(&raise_cpi_nesting_limit_to_8::id())
-            .is_none(),
-        "feature accounts should not be created for features inactive on mainnet"
-    );
+    for feature_id in LiteSVM::mainnet_feature_set().inactive() {
+        assert!(
+            svm.get_account(feature_id).is_none(),
+            "inactive feature account {feature_id} should not exist"
+        );
+    }
 }
 
 #[test_log::test]
-fn mainnet_feature_set_matches_mainnet_activation_state() {
+fn mainnet_feature_set_matches_mainnet_snapshot() {
     let feature_set = LiteSVM::mainnet_feature_set();
 
-    assert!(
-        feature_set.is_active(&accounts_lt_hash::id()),
-        "accounts_lt_hash is active on mainnet (SIMD-0215)"
-    );
-    assert!(
-        !feature_set.is_active(&alpenglow::id()),
-        "alpenglow is not yet active on mainnet"
-    );
-    assert!(
-        !feature_set.is_active(&raise_cpi_nesting_limit_to_8::id()),
-        "raise_cpi_nesting_limit_to_8 is not yet active on mainnet"
-    );
+    assert_eq!(feature_set.active().len(), MAINNET_ACTIVE_FEATURES.len());
+    for (feature_id, activation_slot) in MAINNET_ACTIVE_FEATURES {
+        assert_eq!(
+            feature_set.active().get(feature_id),
+            Some(activation_slot),
+            "{feature_id}"
+        );
+    }
 }