Boston Marathon logo
BOSTON MARATHON 2023

Gary Keith

Bib: 10911•M

MT

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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:12/mi
22:23
↑ 97↓ 3451.5%
10K· 6.21 mi
7:06/mi
44:28
↑ 79↓ 1380.4%
15K· 9.32 mi
7:09/mi
1:06:40
↑ 67↓ 78
20K· 12.43 mi
7:16/mi
1:29:14
↑ 106↓ 860.1%
Half· 13.11 mi
7:15/mi
1:34:11
↑ 19↓ 370.5%
25K· 15.53 mi
7:24/mi
1:52:07
↑ 66↓ 880.2%
30K· 18.64 mi
7:51/mi
2:16:30
↑ 181↓ 1480.2%
20M
9:05/mi
2:28:50
↑ 64↓ 500.2%
21M
12:10/mi
2:41:00
↑ 106↓ 241.6%
35K· 21.75 mi
11:31/mi
2:49:37
↑ 17↓ 861.7%
23M
13:25/mi
3:06:25
↑ 23↓ 630.6%
24M
12:18/mi
3:18:43
↓ 821.3%
40K· 24.85 mi
12:46/mi
3:29:38
↓ 200.3%
25.2M
15:08/mi
3:34:51
↑ 13↓ 160.2%
Finish· 26.22 mi
10:40/mi
3:45:43
↑ 22↓ 21

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
Time1:34:11
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time2:11:32
Pace10:02 /mi
📊Positive Split: 39.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:5122:237:1222:23
7:12
-
10K
6.21 mi11:10:5644:287:0922:05
7:06
-0:06
15K
9.32 mi11:33:081:06:407:0922:12
7:09
+0:03
20K
12.43 mi11:55:421:29:147:1122:34
7:16
+0:07
Half
13.11 mi12:00:391:34:117:114:57
7:15
-0:01
25K
15.53 mi12:18:351:52:077:1317:56
7:24
+0:09
30K
18.64 mi12:42:582:16:307:1924:23
7:51
+0:27
20M
20.00 mi12:55:182:28:507:2612:20
9:05
+1:14
21M
21.00 mi13:07:282:41:007:4012:10
12:10
+3:05
35K
21.75 mi13:16:052:49:377:488:37
11:31
-0:39
23M
23.00 mi13:32:533:06:258:0616:48
13:25
+1:54
24M
24.00 mi13:45:113:18:438:1712:18
12:18
-1:07
40K
24.85 mi13:56:063:29:388:2610:55
12:46
+0:28
25.2M
25.20 mi14:01:193:34:518:325:13
15:08
+2:22
Finish
26.22 mi14:12:113:45:438:3710:52
10:40
-4:28

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

7:06 /mi

Average Pace

8:37 /mi

Slowest Pace

15:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:07

50% of race

Time at Steady Pace

36:43

16% of race

Time at Slower Pace

1:16:53

34% of race

Average Pace: 8:37 /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 mi10:48:5122:237:1222:23
7:12
#7533
10K
6.21 mi11:10:5644:287:0922:05
7:06
#7463
15K
9.32 mi11:33:081:06:407:0922:12
7:09
#7435
20K
12.43 mi11:55:421:29:147:1122:34
7:16
#7408
Half
13.11 mi12:00:391:34:117:114:57
7:15
#7445
25K
15.53 mi12:18:351:52:077:1317:56
7:24
#7493
30K
18.64 mi12:42:582:16:307:1924:23
7:51
#7801
20M
20.00 mi12:55:182:28:507:2612:20
9:05
#8491
21M
21.00 mi13:07:282:41:007:4012:10
12:10
#9955
35K
21.75 mi13:16:052:49:377:488:37
11:31
#10964
23M
23.00 mi13:32:533:06:258:0616:48
13:25
#13235
24M
24.00 mi13:45:113:18:438:1712:18
12:18
#14446
40K
24.85 mi13:56:063:29:388:2610:55
12:46
#15356
25.2M
25.20 mi14:01:193:34:518:325:13
15:08
#15829
Finish
26.22 mi14:12:113:45:438:3710:52
10:40
#16310
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi7533667766777448(Top 28%)6565(Top 43%)6565(Top 320%)
10K6.21 mi3.10 mi7463+706610+676610+677504(Top 28%)6606(Top 44%)6606(Top 322%)
15K9.32 mi3.11 mi7435+286582+286582+287448(Top 28%)6565(Top 43%)6565(Top 320%)
20K12.43 mi3.11 mi7408+276545+376545+377534(Top 28%)6586(Top 43%)6586(Top 321%)
Half13.11 mi0.68 mi7445-376570-256570-258270(Top 31%)7084(Top 47%)7084(Top 345%)
25K15.53 mi2.42 mi7493-486593-236593-237999(Top 30%)6810(Top 45%)6810(Top 332%)
30K18.64 mi3.11 mi7801-3086746-1536746-1539730(Top 37%)7691(Top 51%)7691(Top 375%)
20M20.00 mi1.36 mi8491-6907168-4227168-42216906(Top 64%)10788(Top 71%)10788(Top 526%)
21M21.00 mi1.00 mi9955-14648017-8498017-84922984(Top 86%)13419(Top 88%)13419(Top 654%)
35K21.75 mi0.75 mi10964-10098492-4758492-47524114(Top 91%)13900(Top 92%)13900(Top 677%)
23M23.00 mi1.25 mi13235-22719464-9729464-97225449(Top 96%)14555(Top 96%)14555(Top 709%)
24M24.00 mi1.00 mi14446-12119908-4449908-44424847(Top 93%)14217(Top 94%)14217(Top 693%)
40K24.85 mi0.85 mi15356-91010241-33310241-33324737(Top 93%)14172(Top 93%)14172(Top 691%)
25.2M25.20 mi0.35 mi15829-47310424-18310424-18325760(Top 97%)14678(Top 97%)14678(Top 715%)
Finish26.22 mi1.02 mi16310-48110624-20010624-20023337(Top 88%)13487(Top 89%)13487(Top 657%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

7448

Males

6565

M50-54

6565

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

7504

Males

6606

M50-54

6606

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

7448

Males

6565

M50-54

6565

15K→20K

9.3 - 12.4 mi

Top 28%
×5story building
+106ft-86ft

Overall

7534

Males

6586

M50-54

6586

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8270

Males

7084

M50-54

7084

Half→25K

13.1 - 15.5 mi

Top 30%
×4story building
+66ft-88ft

Overall

7999

Males

6810

M50-54

6810

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

9730

Males

7691

M50-54

7691

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

16906

Males

10788

M50-54

10788

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

22984

Males

13419

M50-54

13419

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

24114

Males

13900

M50-54

13900

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

25449

Males

14555

M50-54

14555

23M→24M

23.0 - 24.0 mi

Top 93%
×6story building
+12ft-82ft

Overall

24847

Males

14217

M50-54

14217

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

24737

Males

14172

M50-54

14172

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

25760

Males

14678

M50-54

14678

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23337

Males

13487

M50-54

13487

Passing Analysis

Category:
Athletes Passed
695
Passed By
9469
Net Change
-8777
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7533
5K → 10K257187+70#7533#7463
10K → 15K147119+28#7463#7435
15K → 20K12598+27#7435#7408
20K → Half1047-37#7408#7445
Half → 25K66114-48#7445#7493
25K → 30K62370-308#7493#7801
30K → 20M9699-690#7801#8491
20M → 21M01463-1464#8491#9955
21M → 35K21009-1009#9955#10964
35K → 23M12272-2271#10964#13235
23M → 24M21213-1211#13235#14446
24M → 40K4914-910#14446#15356
40K → 25.2M1474-473#15356#15829
25.2M → Finish9490-481#15829#16310
TOTALS6959469-8777
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing