Medium Transport
Flight Crew Air Transport Pilot (ATP)
Distraction; Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Flight Crew Took Evasive Action
Human Factors
I was PF (Pilot Flying) during a visual approach to BOI 28R backed up by the ILS in VMC conditions. We were cleared for the visual and turned base inside ZIXIP. I was descending to catch the glideslope; which was below us. At this time; I called for the Landing Checklist. I became too distracted by items on the Landing Checklist; and allowed the airplane to descend below glideslope and continue descending. The EGPWS [had] an amber terrain caution message; not a red terrain warning message. I leveled the airplane to maintain altitude; and the caution message went away. I then intercepted the glideslope from that altitude. I continued to a landing in BOI without any additional incidents.If I had stayed 'heads up' while descending; I would have easily intercepted the glideslope from above. While responding to the Landing Checklist; I should have stayed heads up; instead of becoming fixated on gear; flaps; etc. I should have allowed the PM (Pilot Monitoring) to focus on those items; which I could have easily verified after intercepting the glideslope and becoming stable. Another option would have been to call for the Landing Checklist after intercepting the glideslope and becoming stable.
Medium Transport First Officer reported receiving an EGPWS warning on approach to BOI airport.