Boston Marathon logo
BOSTON MARATHON 2023

Keith Gilbreath

Bib: 11352•M

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:25
Rank: #12915
Start → 5K
24:25 | 7:52/mi
10K· 6.21 mi
48:40
Rank: #12993 (-78)
5K → 10K
24:15 | 7:48/mi
15K· 9.32 mi
1:13:54
Rank: #13804 (-811)
10K → 15K
25:14 | 8:07/mi
20K· 12.43 mi
1:40:47
Rank: #14936 (-1132)
15K → 20K
26:53 | 8:39/mi
Half· 13.11 mi
1:47:01
Rank: #15320 (-384)
20K → Half
6:14 | 9:08/mi
25K· 15.53 mi
2:09:09
Rank: #16131 (-811)
Half → 25K
22:08 | 9:08/mi
30K· 18.64 mi
2:38:48
Rank: #16886 (-755)
25K → 30K
29:39 | 9:33/mi
20M
2:52:38
Rank: #17310 (-424)
30K → 20M
13:50 | 10:11/mi
21M
3:03:19
Rank: #17568 (-258)
20M → 21M
10:41 | 10:41/mi
35K· 21.75 mi
3:10:17
Rank: #17635 (-67)
21M → 35K
6:58 | 9:19/mi
23M
3:22:07
Rank: #17688 (-53)
35K → 23M
11:50 | 9:27/mi
24M
3:30:55
Rank: #17633 (+55)
23M → 24M
8:48 | 8:48/mi
40K· 24.85 mi
3:38:10
Rank: #17466 (+167)
24M → 40K
7:15 | 8:29/mi
25.2M
3:41:43
Rank: #17501 (-35)
40K → 25.2M
3:33 | 10:18/mi
Finish· 26.22 mi
3:49:55
Rank: #17331 (+170)
25.2M → Finish
8:12 | 8:03/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:01
Pace8:10 /mi
2nd Half
Distance13.11 mi
Time2:02:54
Pace9:23 /mi
📊Positive Split: 14.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4524:257:5224:25
7:52
-
10K
6.21 mi11:16:0048:407:5024:15
7:48
-0:04
15K
9.32 mi11:41:141:13:547:5625:14
8:07
+0:19
20K
12.43 mi12:08:071:40:478:0726:53
8:39
+0:32
Half
13.11 mi12:14:211:47:018:106:14
9:08
+0:29
25K
15.53 mi12:36:292:09:098:1922:08
9:08
0:00
30K
18.64 mi13:06:082:38:488:3129:39
9:33
+0:25
20M
20.00 mi13:19:582:52:388:3813:50
10:11
+0:38
21M
21.00 mi13:30:393:03:198:4410:41
10:41
+0:30
35K
21.75 mi13:37:373:10:178:456:58
9:19
-1:22
23M
23.00 mi13:49:273:22:078:4711:50
9:27
+0:08
24M
24.00 mi13:58:153:30:558:478:48
8:48
-0:39
40K
24.85 mi14:05:303:38:108:477:15
8:29
-0:19
25.2M
25.20 mi14:09:033:41:438:483:33
10:18
+1:49
Finish
26.22 mi14:17:153:49:558:478:12
8:03
-2:15

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:48 /mi

Average Pace

8:47 /mi

Slowest Pace

10:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:14

51% of race

Time at Steady Pace

1:25:37

37% of race

Time at Slower Pace

28:04

12% of race

Average Pace: 8:46 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:51:4524:257:5224:25
7:52
#12915
10K
6.21 mi11:16:0048:407:5024:15
7:48
#12993
15K
9.32 mi11:41:141:13:547:5625:14
8:07
#13804
20K
12.43 mi12:08:071:40:478:0726:53
8:39
#14936
Half
13.11 mi12:14:211:47:018:106:14
9:08
#15320
25K
15.53 mi12:36:292:09:098:1922:08
9:08
#16131
30K
18.64 mi13:06:082:38:488:3129:39
9:33
#16886
20M
20.00 mi13:19:582:52:388:3813:50
10:11
#17310
21M
21.00 mi13:30:393:03:198:4410:41
10:41
#17568
35K
21.75 mi13:37:373:10:178:456:58
9:19
#17635
23M
23.00 mi13:49:273:22:078:4711:50
9:27
#17688
24M
24.00 mi13:58:153:30:558:478:48
8:48
#17633
40K
24.85 mi14:05:303:38:108:477:15
8:29
#17466
25.2M
25.20 mi14:09:033:41:438:483:33
10:18
#17501
Finish
26.22 mi14:17:153:49:558:478:12
8:03
#17331
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi129159508950815303(Top 57%)10435(Top 69%)10435(Top 509%)
10K6.21 mi3.10 mi12993-789532-249532-2413155(Top 49%)9624(Top 63%)9624(Top 469%)
15K9.32 mi3.11 mi13804-8119842-3109842-31015303(Top 57%)10435(Top 69%)10435(Top 509%)
20K12.43 mi3.11 mi14936-113210274-43210274-43217814(Top 67%)11388(Top 75%)11388(Top 555%)
Half13.11 mi0.68 mi15320-38410412-13810412-13820917(Top 79%)12685(Top 84%)12685(Top 618%)
25K15.53 mi2.42 mi16131-81110697-28510697-28519557(Top 73%)12078(Top 80%)12078(Top 589%)
30K18.64 mi3.11 mi16886-75510977-28010977-28019589(Top 74%)12039(Top 79%)12039(Top 587%)
20M20.00 mi1.36 mi17310-42411126-14911126-14920943(Top 79%)12537(Top 83%)12537(Top 611%)
21M21.00 mi1.00 mi17568-25811208-8211208-8220085(Top 75%)12087(Top 80%)12087(Top 589%)
35K21.75 mi0.75 mi17635-6711227-1911227-1919181(Top 72%)11664(Top 77%)11664(Top 568%)
23M23.00 mi1.25 mi17688-5311232-511232-518119(Top 68%)11163(Top 74%)11163(Top 544%)
24M24.00 mi1.00 mi17633+5511196+3611196+3616176(Top 61%)10254(Top 68%)10254(Top 500%)
40K24.85 mi0.85 mi17466+16711123+7311123+7313197(Top 50%)8882(Top 59%)8882(Top 433%)
25.2M25.20 mi0.35 mi17501-3511132-911132-918416(Top 69%)11208(Top 74%)11208(Top 546%)
Finish26.22 mi1.02 mi17331+17011050+8211050+8212435(Top 47%)8503(Top 56%)8503(Top 414%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21stories
+97ft-345ft

Overall

15303

Males

10435

M50-54

10435

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

13155

Males

9624

M50-54

9624

10K→15K

6.2 - 9.3 mi

Top 57%
×3stories
+67ft-78ft

Overall

15303

Males

10435

M50-54

10435

15K→20K

9.3 - 12.4 mi

Top 67%
×5stories
+106ft-86ft

Overall

17814

Males

11388

M50-54

11388

20K→Half

12.4 - 13.1 mi

Top 79%
×2stories
+19ft-37ft

Overall

20917

Males

12685

M50-54

12685

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

19557

Males

12078

M50-54

12078

25K→30K

15.5 - 18.6 mi

Top 74%
×9stories
+181ft-148ft

Overall

19589

Males

12039

M50-54

12039

30K→20M

18.6 - 20.0 mi

Top 79%
×5stories
+64ft-50ft

Overall

20943

Males

12537

M50-54

12537

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

20085

Males

12087

M50-54

12087

21M→35K

21.0 - 21.8 mi

Top 72%
×7stories
+17ft-86ft

Overall

19181

Males

11664

M50-54

11664

35K→23M

21.8 - 23.0 mi

Top 68%
×5stories
+23ft-63ft

Overall

18119

Males

11163

M50-54

11163

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

16176

Males

10254

M50-54

10254

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13197

Males

8882

M50-54

8882

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18416

Males

11208

M50-54

11208

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2stories
+22ft-21ft

Overall

12435

Males

8503

M50-54

8503

Passing Analysis

Category:
Athletes Passed
1012
Passed By
5428
Net Change
-4416
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12915
5K → 10K277355-78#12915#12993
10K → 15K33844-811#12993#13804
15K → 20K291161-1132#13804#14936
20K → Half6390-384#14936#15320
Half → 25K22833-811#15320#16131
25K → 30K48803-755#16131#16886
30K → 20M14438-424#16886#17310
20M → 21M27285-258#17310#17568
21M → 35K2794-67#17568#17635
35K → 23M66119-53#17635#17688
23M → 24M9035+55#17688#17633
24M → 40K1747+167#17633#17466
40K → 25.2M2661-35#17466#17501
25.2M → Finish1733+170#17501#17331
TOTALS10125428-4416
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing