Boston Marathon logo
BOSTON MARATHON 2023

Fredrick Jackson

Bib: 15839•M

KY

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M70-74)
#0 / 213
Top 16%
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
9:08/mi
28:24
↑ 97↓ 3451.5%
10K· 6.21 mi
9:10/mi
56:52
↑ 79↓ 1380.4%
15K· 9.32 mi
9:04/mi
1:25:03
↑ 67↓ 78
20K· 12.43 mi
9:13/mi
1:53:42
↑ 106↓ 860.1%
Half· 13.11 mi
8:46/mi
1:59:41
↑ 19↓ 370.5%
25K· 15.53 mi
9:07/mi
2:21:47
↑ 66↓ 880.2%
30K· 18.64 mi
9:11/mi
2:50:18
↑ 181↓ 1480.2%
20M
9:09/mi
3:02:44
↑ 64↓ 500.2%
21M
9:28/mi
3:12:12
↑ 106↓ 241.6%
35K· 21.75 mi
8:35/mi
3:18:37
↑ 17↓ 861.7%
23M
8:54/mi
3:29:46
↑ 23↓ 630.6%
24M
8:27/mi
3:38:13
↓ 821.3%
40K· 24.85 mi
8:44/mi
3:45:41
↓ 200.3%
25.2M
9:23/mi
3:48:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:12/mi
3:57:16
↑ 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 Half
Distance13.11 mi
Time1:59:41
Pace9:08 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:57:35
Pace8:58 /mi
📊Negative Split: 1.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:59:1528:249:0828:24
9:08
-
10K
6.21 mi11:27:4356:529:0928:28
9:10
+0:02
15K
9.32 mi11:55:541:25:039:0728:11
9:04
-0:06
20K
12.43 mi12:24:331:53:429:0928:39
9:13
+0:09
Half
13.11 mi12:30:321:59:419:085:59
8:46
-0:27
25K
15.53 mi12:52:382:21:479:0822:06
9:07
+0:21
30K
18.64 mi13:21:092:50:189:0828:31
9:11
+0:04
20M
20.00 mi13:33:353:02:449:0812:26
9:09
-0:02
21M
21.00 mi13:43:033:12:129:099:28
9:28
+0:19
35K
21.75 mi13:49:283:18:379:086:25
8:35
-0:53
23M
23.00 mi14:00:373:29:469:0711:09
8:54
+0:19
24M
24.00 mi14:09:043:38:139:068:27
8:27
-0:27
40K
24.85 mi14:16:323:45:419:057:28
8:44
+0:17
25.2M
25.20 mi14:19:463:48:559:053:14
9:23
+0:39
Finish
26.22 mi14:28:073:57:169:038:21
8:12
-1:11

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

8:12 /mi

Average Pace

9:03 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

47:49

20% of race

Time at Steady Pace

3:09:27

80% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:03 /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 mi10:59:1528:249:0828:24
9:08
#20999
10K
6.21 mi11:27:4356:529:0928:28
9:10
#21252
15K
9.32 mi11:55:541:25:039:0728:11
9:04
#21129
20K
12.43 mi12:24:331:53:429:0928:39
9:13
#20986
Half
13.11 mi12:30:321:59:419:085:59
8:46
#20900
25K
15.53 mi12:52:382:21:479:0822:06
9:07
#20672
30K
18.64 mi13:21:092:50:189:0828:31
9:11
#20215
20M
20.00 mi13:33:353:02:449:0812:26
9:09
#19982
21M
21.00 mi13:43:033:12:129:099:28
9:28
#19733
35K
21.75 mi13:49:283:18:379:086:25
8:35
#19610
23M
23.00 mi14:00:373:29:469:0711:09
8:54
#19394
24M
24.00 mi14:09:043:38:139:068:27
8:27
#19194
40K
24.85 mi14:16:323:45:419:057:28
8:44
#19040
25.2M
25.20 mi14:19:463:48:559:053:14
9:23
#18977
Finish
26.22 mi14:28:073:57:169:038:21
8:12
#18811
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi20999126081260820817(Top 78%)12662(Top 83%)12662(Top 5945%)
10K6.21 mi3.10 mi21252-25312782-17412782-17421500(Top 81%)12923(Top 85%)12923(Top 6067%)
15K9.32 mi3.11 mi21129+12312759+2312759+2320817(Top 78%)12662(Top 83%)12662(Top 5945%)
20K12.43 mi3.11 mi20986+14312699+6012699+6020650(Top 78%)12598(Top 83%)12598(Top 5915%)
Half13.11 mi0.68 mi20900+8612669+3012669+3019305(Top 73%)12011(Top 79%)12011(Top 5639%)
25K15.53 mi2.42 mi20672+22812568+10112568+10119484(Top 73%)12049(Top 79%)12049(Top 5657%)
30K18.64 mi3.11 mi20215+45712342+22612342+22618068(Top 68%)11359(Top 75%)11359(Top 5333%)
20M20.00 mi1.36 mi19982+23312230+11212230+11217303(Top 65%)10948(Top 72%)10948(Top 5140%)
21M21.00 mi1.00 mi19733+24912125+10512125+10515804(Top 59%)10278(Top 68%)10278(Top 4825%)
35K21.75 mi0.75 mi19610+12312062+6312062+6315730(Top 59%)10185(Top 67%)10185(Top 4782%)
23M23.00 mi1.25 mi19394+21611972+9011972+9015559(Top 58%)10061(Top 66%)10061(Top 4723%)
24M24.00 mi1.00 mi19194+20011872+10011872+10014185(Top 53%)9396(Top 62%)9396(Top 4411%)
40K24.85 mi0.85 mi19040+15411797+7511797+7514717(Top 55%)9567(Top 63%)9567(Top 4492%)
25.2M25.20 mi0.35 mi18977+6311767+3011767+3014553(Top 55%)9509(Top 63%)9509(Top 4464%)
Finish26.22 mi1.02 mi18811+16611681+8611681+8613390(Top 50%)8975(Top 59%)8975(Top 4214%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

20817

Males

12662

M70-74

12662

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

21500

Males

12923

M70-74

12923

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

20817

Males

12662

M70-74

12662

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

20650

Males

12598

M70-74

12598

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

19305

Males

12011

M70-74

12011

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

19484

Males

12049

M70-74

12049

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

18068

Males

11359

M70-74

11359

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17303

Males

10948

M70-74

10948

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15804

Males

10278

M70-74

10278

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

15730

Males

10185

M70-74

10185

35K→23M

21.8 - 23.0 mi

Top 58%
×5story building
+23ft-63ft

Overall

15559

Males

10061

M70-74

10061

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14185

Males

9396

M70-74

9396

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

14717

Males

9567

M70-74

9567

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14553

Males

9509

M70-74

9509

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

13390

Males

8975

M70-74

8975

Passing Analysis

Category:
Athletes Passed
2848
Passed By
660
Net Change
+2188
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20999
5K → 10K176429-253#20999#21252
10K → 15K227104+123#21252#21129
15K → 20K21875+143#21129#20986
20K → Half915+86#20986#20900
Half → 25K24113+228#20900#20672
25K → 30K4625+457#20672#20215
30K → 20M2385+233#20215#19982
20M → 21M2534+249#19982#19733
21M → 35K1263+123#19733#19610
35K → 23M2248+216#19610#19394
23M → 24M2011+200#19394#19194
24M → 40K1562+154#19194#19040
40K → 25.2M674+63#19040#18977
25.2M → Finish1682+166#18977#18811
TOTALS2848660+2188
📊

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