B737 captain reported an air return due to a runaway trim and speed trim failure.

Attributes
ACN	1735588
Time
Date	202003
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Aeroplane Flight Control
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 49 Flight Crew Total 217 Flight Crew Type 217
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Weather / Turbulence

Narrative:

On climb out of ZZZ; first officer (first officer) was PF (pilot flying) and experienced a runaway trim and speed trim failure annunciation light. Ran the QRH for both checklists. Contacted dispatch and was told to continue to ZZZ1. Asked for dispatch to include [maintenance] in discussion. While waiting for them to get back to us; the first officer and I determined the best course of action was to return to ZZZ due to weather and terrain . We advised ATC and started back towards ZZZ. I briefed the flight attendants without preparing the cabin for evacuation. On approach first officer continued to fly while I assisted with manual trim. Normal landing and taxied to gate to debrief with maintenance. After talking with ZZZ [chief pilot] elected to discontinue the rest of our flying for the day.

Original NASA ASRS Text

Title: B737 Captain reported an air return due to a runaway trim and speed trim failure.

Narrative: On climb out of ZZZ; FO (First Officer) was PF (Pilot Flying) and experienced a runaway trim and speed trim failure annunciation light. Ran the QRH for both checklists. Contacted dispatch and was told to continue to ZZZ1. Asked for Dispatch to include [Maintenance] in discussion. While waiting for them to get back to us; the FO and I determined the best course of action was to return to ZZZ due to weather and terrain . We advised ATC and started back towards ZZZ. I briefed the flight attendants without preparing the cabin for evacuation. On approach FO continued to fly while I assisted with manual trim. Normal landing and taxied to gate to debrief with Maintenance. After talking with ZZZ [Chief Pilot] elected to discontinue the rest of our flying for the day.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.