Best mid-level adventure?

[Tharian]

I'm not sure if you have access to them (I'd have to dig them out of boxes myself) but perhaps some of the Side Treks in Dungeon magazine would fit the bill. They were meant to be short and some were at the level range you mention.

Sorry I can't give you specifics. I haven't unpacked those since the move.

 

[Mark CMG]

There are also a few freebies here -

WotC Free Adventures

- and here -

WotC Cliffhangers

- and here -

Dungeon Adventure Archive

- and here's the Dungeon Magazine Index -

Dungeon Index | intwischa.com

A Dark and Stormy Knight . . . . Owen K.C. Stephens . . . . 1st Generic D&D
Burning Plague, The . . . . Miguel Duran . . . . 1st Generic D&D
Wreck Ashore . . . . Robert Wiese . . . . 1st Generic D&D

Something's Cooking . . . . Andy Collins . . . . 2nd Generic D&D

Ettin's Riddle, The . . . . JD Wiker . . . . 2nd-3rd Generic D&D

Secret of the Windswept Wall, The . . . . Eric Haddock . . . . 2nd-4th Generic D&D

Dry Spell . . . . Darrin Drader . . . . 3rd Generic D&D
Frozen Whispers . . . . James Jacobs . . . . 3rd Generic D&D
Manifesting: A Tale . . . . Angel Leigh McCoy . . . . 3rd Generic D&D

Bad Light . . . . Owen K. C. Stephens . . . . 4th Generic D&D
Eye of the Sun, The . . . . Eric Cagle . . . . 4th Generic D&D
Vessel of Stars, The . . . . Robert Holzmeier . . . . 4th Generic D&D

Base of Operations . . . . Ed Stark . . . . 5th Generic D&D
Fallen Angel . . . . Ramon Arjona . . . . 5th Generic D&D

One Last Riddle . . . . David Eckelberry . . . . 5th-7th Generic D&D

Alchemist's Eyrie, The . . . . Edward Bolme . . . . 6th Generic D&D
Ghosts of Aniel, The . . . . Stephen Kenson . . . . 6th Generic D&D
House of Harpies . . . . Owen K. C. Stephens . . . . 6th Generic D&D
Ministry of Winds, The . . . . Monte Cook . . . . 6th Generic D&D
Test of the Demonweb . . . . Ramon Arjona . . . . 6th Generic D&D

Hasken's Manor . . . . Scott Brocius and Mark A. Jindra . . . . 7th Generic D&D
Into the Frozen Waste . . . . Eric Cagle . . . . 7th Generic D&D
Lest Darkness Rise . . . . Owen K. C. Stephens . . . . 7th Generic D&D
Start at the End . . . . Rich Redman . . . . 7th Generic D&D

Treasure of the Black Veils, The . . . . Skip and Penny Williams . . . . 7th-9th Generic D&D

Environmental Impact . . . . Ramon Arjona . . . . 8th Generic D&D
Eye for an Eye, An . . . . Monte Cook . . . . 8th Generic D&D
Fang, Beak, and Claw . . . . Sean K. Reynolds . . . . 8th FR
Shoals of Intrigue . . . . Robert Wiese . . . . 8th Generic D&D

Cave of Spiders . . . . Skip Williams . . . . 9th Generic D&D
Tower in the Ice . . . . Skip Williams . . . . 9th Generic D&D
Tower of Deception, The . . . . Monte Cook . . . . 9th Generic D&D
Tomb of Horrors . . . . Gary Gygax/Bruce Cordell . . . . 9th Generic D&D

Tiger's Palace . . . . Owen K.C. Stephens . . . . 9th-10th Generic D&D

Bad Moon Waning . . . . Stan . . . . 10th Generic D&D
Sea Witch, The . . . . Jason Carl . . . . 10th Generic D&D
Crumbling Hall of the Frost Giant Jarl, The . . . . Andy Collins . . . . 10th Generic D&D
Tarus's Banquet! S . . . . ean K Reynolds . . . . 10th Libris Mortis
Temple of Redcliff, The . . . . Eric Cagle . . . . 10th Generic D&D
To Quell the Rising Storm . . . . Christopher Lindsay . . . . 10th Generic D&D

Harvest of Evil, A . . . . Jason Carl . . . . 10th-12th Generic D&D

Road to Oblivion . . . . Penny Williams . . . . 11th Generic D&D
Self-Fulfilling Prophecy? . . . . Gwendolyn F. M. Kestrel . . . . 11th Generic D&D
Sheep's Clothing . . . . Robert Wiese . . . . 11th Generic D&D

Fait Accompli . . . . Owen K.C. Stephens . . . . 12th Generic D&D
Question of Ethics, A . . . . Monte Cook . . . . 12th Generic D&D
Shrine of the Feathered Serpent . . . . Skip Williams . . . . 12th Generic D&D
Thicker Than Water . . . . Monte Cook . . . . 12th Generic D&D

Desert Sands . . . . Gwendolyn F. M. Kestrel . . . . 13th Generic D&D
Frigid Demise, A . . . . Monte Cook . . . . 13th Generic D&D

Ill Wind in Friezford . . . . Skip and Penny Williams . . . . 14th Generic D&D
Stone Dead . . . . Stan . . . . 14th Generic D&D

Lochfell's Secret . . . . Eric Haddock . . . . 15th Generic D&D
Matters of Vengeance . . . . Darrin Drader . . . . 15th Generic D&D

Black Rain . . . . Monte Cook . . . . 16th Generic D&D

Haunting Lodge . . . . Owen K. C. Stephens . . . . 17th Generic D&D
Thunder Below, The . . . . James Jacobs . . . . 17th Generic D&D

Force of Nature . . . . Mark A. Jindra . . . . 18th Generic D&D
War of Dragons . . . . Robert Wiese . . . . 18th Generic D&D

Icy Heart, An . . . . Eric Haddock . . . . 20th Generic D&D

The Approaching Swarm 06/10/02

Kingdom of the Blind 05/13/02

Into the Forsaken Temple's Crypt 04/08/02

The Trouble in Town 03/11/02

Sharkbait! 02/11/02

The Light of Despair 01/14/02

Training Grounds 12/10/01

Lorin's Chasm 11/12/01

Bridge Work 10/08/01

Nest of Corruption 09/10/01

Special: Cliffhangers Live! 08/17/01

Hindsight 08/13/01

A Giant Ransom 07/09/01

Black Water 06/11/01

The Horror of Lannock Hill 05/07/01

Over the Edge 04/02/01

Equinox 03/05/01

The Proper Count 02/05/01

The Tower of Lore 01/08/01

The Candlemaker's Fire 12/04/00

The Hallowed Hills 11/01/00

The Village of Camiram 10/01/00

Unearthing the Past 09/01/00