Split Mountain

Split Mountain Canyon, Dinosaur National Monument · Class III · UT

Lottery

2,720Oct 22 snapshot

Runnable

Snapshot from Oct 22, 2026. Live reading loading.

Runnable range 1,000 to 8,000 cfs. This is a draft estimate that paddlers have not reviewed yet.

Season

Spring to fall

Character

Popular day run through a split canyon near Vernal.

Watch for

Single-day permits are available on Recreation.gov.

Gauge

USGS 09261000
Green River near Jensen
2,720 cfs at 6:30 PM MT on Oct 22, 2026 (snapshot)

Permit

LotteryOpens Dec 1, in 29 days.

Apply Dec 1 to Jan 31 on Recreation.gov. Results by mid-February.

Apply on Recreation.gov Official page

Fees and rules

$15 application. $185 multiday permit. $20 one-day permit.

One high-use application per person, and applicants must be 18 or older. Green River high-use season runs from the second Monday of May to the second Friday of September. Yampa high-use season runs from the second Monday of May to the second Saturday of July.

Source: NPS page, last updated March 2025.

Snowpack

Green — Dinosaur / Flaming GorgeEarly seasonDam-regulated

Snow water equivalent 0.2 in. Early season — median too low for a meaningful %.

Dam-regulated: Flaming Gorge Dam. Flows on this river also depend on reservoir releases — snowpack alone does not determine flows. Applies to the Green River runs below the dam.

Outlook indicator, not a flow forecast. Spring temperatures, rain, soil moisture, dust on snow and reservoir releases also matter. NRCS SNOTEL data as of Oct 31, 2026 (provisional).

See basin snowpack

Draft details for paddlers to review and edit. Community voting on runnable ranges is coming.

Trip reports

Wavetrain is an early build. Flow readings are USGS provisional data and may be revised. Runnable ranges and run details are drafts for paddlers to review. Permit dates and rules come from the agency pages linked on each permit and can change. Snowpack figures come from NRCS SNOTEL stations, are provisional, and are grouped into basins by watershed, so they may differ from official NRCS basin reports. Nothing here replaces scouting, local knowledge or a conversation with a nearby outfitter.