Denver / Bus
RTD 121 live tracking and departures
Peoria Street · America/Denver
Selected branch: 40th & Airport Stn via Montbello · 74 stops.
121 live vehicle tracking
Live predictions available. Fresh vehicle positions only; 0 fresh vehicles matched to this route. The map shows vehicles assigned to the selected stopping pattern. Vehicles on other branches may be omitted.
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Official route geometry · 0 fresh vehicles on selected branch
Positions refresh every 30 seconds. An absent marker does not establish a canceled trip. Predictions and vehicle positions can have different availability.
Next departures from Nine Mile Station Gate G
40th & Airport Stn via MontbelloScheduled
54 min2:58 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
3:58 AM3:58 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
4:28 AM4:28 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
4:58 AM4:58 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
5:28 AM5:28 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
5:58 AM5:58 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
6:28 AM6:28 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
6:56 AM6:56 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
7:26 AM7:26 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
7:56 AM7:56 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
8:26 AM8:26 AM · Sat, Oct 24
40th & Airport Stn via MontbelloScheduled
8:56 AM8:56 AM · Sat, Oct 24
Live predictions available · Live predictions and published schedule fallbacks are labeled on each departure.
More RTD travel information
Published RTD schedule
Imported Oct 23, 2026 · 19:08 UTC · Service dates 2026-09-27 through 2027-01-02. See data status
Transit data provided by the Regional Transportation District. This independent site is not endorsed by, sponsored by, or affiliated with RTD. Source details ↗