105 Quartz St, Bozeman, MT 59718
Montana Angler Fly Fishing, founded and led by photographer and guide Brian Grossenbacher, occupies a singular position in the fly fishing world: a Bozeman-based operation that functions simultaneously as a premier international fly fishing travel agency and a first-rate local Montana guide service. This is not a retail shop — it is an experience design firm for serious anglers who want the best fishing the world can offer, whether that means three days floating the Madison River or two weeks pursuing taimen on Mongolia's remote Lower Onon. Brian has guided and photographed fly fishing across six continents, and that depth of global perspective shapes everything about how the company operates — from the selection of international destinations to the quality of local guides he retains for Montana work.
On the Montana side, the operation runs guided wade and float trips on the Madison, Gallatin, Jefferson, and Ruby rivers, pairing clients with experienced professionals who match Brian's exacting standards. These are not beginner guiding operations with large client rosters; Montana Angler maintains a deliberately small, quality-focused program. Internationally, the company runs carefully curated expeditions to Mongolia for taimen and lenok, Patagonia for wild sea-run browns and rainbows, Kamchatka for rainbow trout and Pacific salmon, and chalk stream destinations in the United Kingdom. Each itinerary is planned with the care of a bespoke travel designer and the authority of a guide who has fished these places dozens of times. For anglers ready to move beyond familiar water into genuinely transformative territory, Montana Angler is the operation that makes it possible.
Brown Trout, Rainbow Trout
Brown Trout, Rainbow Trout, Brook Trout
Brown Trout, Rainbow Trout
Cutthroat Trout, Rainbow Trout, Brown Trout
Rainbow Trout, Brown Trout, Westslope Cutthroat Trout
Rainbow Trout, Brown Trout, Cutthroat Trout
“Brian is a superb host. We've had the most incredible trip to the Lower Onon River in Mongolia — I've taken fishing trips from Greenland to far southern Argentina and Montana Angler has outdone them all. The quality of the fishing and the level of service were exceptional. Brian was helpful and patient with trip planning we booked two years in advance because of the scarcity of spots. Deeply grateful for an experience far beyond what I had hoped.”
“Three great days on the Madison out of Montana Angler. The lodge offered impeccable service and the chef made truly excellent meals paired with perfect wines. Guides Billie, Owen, and Mike were each top-notch professionals — deep knowledge of the river, patient instruction, and genuine passion for putting clients on fish. Highly recommended. Will be going back.”
“Montana Angler put together the most incredible program on the Lower Onon River in Mongolia. The quality of the fishing was exceptional and the level of service was second to none — every detail handled seamlessly, from planning to time on the water. This experience far exceeded what I had hoped for. Highly recommend to anyone considering a serious international fly fishing expedition.”
