Marshall Lake, located near Flagstaff in Coconino National Forest, is a small marshy body of water with variable water levels that can significantly impact paddling opportunities. The lake is known to temporarily dry up during drought conditions and fall seasons, making it essential to check conditions before planning a trip.

When filled, the lake features a primitive boat ramp for access. Motors are restricted to 10hp or less, creating a quieter environment for paddlers. The lake is actively managed as a wildlife habitat through a partnership between Ducks Unlimited and the Arizona Game and Fish Department.

The lake serves as a significant wildlife viewing destination, particularly for bird enthusiasts. Paddlers can observe resident ospreys hunting, various waterfowl species, and seasonal bald eagles during winter months. The surrounding shoreline comes alive with golden sunflowers during summer months, adding to the scenic value.

Spring and fall offer the most favorable conditions when water is present, with typical temperatures ranging from 50°F to 80°F. Spring (March to May) typically sees temperatures between 60-80°F, while fall (September-November) ranges from 50-70°F.

Primitive campsites are available on the east side of the lake, providing views of the peaks through pine-sheltered locations. The lake's proximity to Lowell Observatory makes it an excellent base for stargazing after paddling.

The lake is located approximately 25 minutes from Flagstaff and is managed as part of Coconino National Forest. During years with sufficient water, the Arizona Game and Fish Department stocks the lake with trout, though paddlers should be aware that fishing activity may be present around the water.