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BOSTON MARATHON 2023

James Nelson

Bib: 31966•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
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
9:29/mi
29:28
↑ 97↓ 3451.5%
10K· 6.21 mi
8:43/mi
56:33
↑ 79↓ 1380.4%
15K· 9.32 mi
8:33/mi
1:23:08
↑ 67↓ 78
20K· 12.43 mi
8:39/mi
1:50:02
↑ 106↓ 860.1%
Half· 13.11 mi
8:33/mi
1:55:52
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:17:04
↑ 66↓ 880.2%
30K· 18.64 mi
8:41/mi
2:44:02
↑ 181↓ 1480.2%
20M
8:58/mi
2:56:13
↑ 64↓ 500.2%
21M
9:04/mi
3:05:17
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
3:11:39
↑ 17↓ 861.7%
23M
8:40/mi
3:22:30
↑ 23↓ 630.6%
24M
8:23/mi
3:30:53
↓ 821.3%
40K· 24.85 mi
9:13/mi
3:38:46
↓ 200.3%
25.2M
8:27/mi
3:41:41
↑ 13↓ 160.2%
Finish· 26.22 mi
7:23/mi
3:49:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:55:52
Pace8:50 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:53:20
Pace8:39 /mi
📊Negative Split: 2.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:4629:289:2929:28
9:29
-
10K
6.21 mi12:16:5156:339:0627:05
8:43
-0:46
15K
9.32 mi12:43:261:23:088:5526:35
8:33
-0:10
20K
12.43 mi13:10:201:50:028:5126:54
8:39
+0:06
Half
13.11 mi13:16:101:55:528:505:50
8:33
-0:06
25K
15.53 mi13:37:222:17:048:4921:12
8:45
+0:12
30K
18.64 mi14:04:202:44:028:4826:58
8:41
-0:04
20M
20.00 mi14:16:312:56:138:4912:11
8:58
+0:17
21M
21.00 mi14:25:353:05:178:499:04
9:04
+0:06
35K
21.75 mi14:31:573:11:398:496:22
8:31
-0:33
23M
23.00 mi14:42:483:22:308:4810:51
8:40
+0:09
24M
24.00 mi14:51:113:30:538:478:23
8:23
-0:17
40K
24.85 mi14:59:043:38:468:487:53
9:13
+0:50
25.2M
25.20 mi15:01:593:41:418:482:55
8:27
-0:46
Finish
26.22 mi15:09:303:49:128:457:31
7:23
-1:04

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

7:23 /mi

Average Pace

8:45 /mi

Slowest Pace

9:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

15:54

7% of race

Time at Steady Pace

2:34:42

67% of race

Time at Slower Pace

58:36

26% of race

Average Pace: 8:44 /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 mi11:49:4629:289:2929:28
9:29
#22033
10K
6.21 mi12:16:5156:339:0627:05
8:43
#21050
15K
9.32 mi12:43:261:23:088:5526:35
8:33
#20212
20K
12.43 mi13:10:201:50:028:5126:54
8:39
#19606
Half
13.11 mi13:16:101:55:528:505:50
8:33
#19533
25K
15.53 mi13:37:222:17:048:4921:12
8:45
#19220
30K
18.64 mi14:04:202:44:028:4826:58
8:41
#18581
20M
20.00 mi14:16:312:56:138:4912:11
8:58
#18399
21M
21.00 mi14:25:353:05:178:499:04
9:04
#18096
35K
21.75 mi14:31:573:11:398:496:22
8:31
#18012
23M
23.00 mi14:42:483:22:308:4810:51
8:40
#17797
24M
24.00 mi14:51:113:30:538:478:23
8:23
#17623
40K
24.85 mi14:59:043:38:468:487:53
9:13
#17627
25.2M
25.20 mi15:01:593:41:418:482:55
8:27
#17491
Finish
26.22 mi15:09:303:49:128:457:31
7:23
#17158
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi22033131151311518176(Top 68%)11549(Top 76%)11549(Top 812%)
10K6.21 mi3.10 mi21050+98312679+43612679+43619503(Top 73%)12092(Top 80%)12092(Top 850%)
15K9.32 mi3.11 mi20212+83812335+34412335+34418176(Top 68%)11549(Top 76%)11549(Top 812%)
20K12.43 mi3.11 mi19606+60612093+24212093+24217843(Top 67%)11400(Top 75%)11400(Top 802%)
Half13.11 mi0.68 mi19533+7312064+2912064+2917947(Top 67%)11469(Top 76%)11469(Top 807%)
25K15.53 mi2.42 mi19220+31311949+11511949+11517609(Top 66%)11241(Top 74%)11241(Top 791%)
30K18.64 mi3.11 mi18581+63911652+29711652+29715392(Top 58%)10214(Top 67%)10214(Top 718%)
20M20.00 mi1.36 mi18399+18211567+8511567+8516339(Top 61%)10545(Top 69%)10545(Top 742%)
21M21.00 mi1.00 mi18096+30311422+14511422+14513790(Top 52%)9402(Top 62%)9402(Top 661%)
35K21.75 mi0.75 mi18012+8411386+3611386+3615374(Top 58%)10027(Top 66%)10027(Top 705%)
23M23.00 mi1.25 mi17797+21511276+11011276+11014168(Top 53%)9448(Top 62%)9448(Top 664%)
24M24.00 mi1.00 mi17623+17411191+8511191+8513760(Top 52%)9219(Top 61%)9219(Top 648%)
40K24.85 mi0.85 mi17627-411188+311188+317163(Top 64%)10650(Top 70%)10650(Top 749%)
25.2M25.20 mi0.35 mi17491+13611126+6211126+629265(Top 35%)6925(Top 46%)6925(Top 487%)
Finish26.22 mi1.02 mi17158+33310979+14710979+1477633(Top 29%)5962(Top 39%)5962(Top 419%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

18176

Males

11549

M55-59

11549

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19503

Males

12092

M55-59

12092

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

18176

Males

11549

M55-59

11549

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

17843

Males

11400

M55-59

11400

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

17947

Males

11469

M55-59

11469

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

17609

Males

11241

M55-59

11241

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

15392

Males

10214

M55-59

10214

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

16339

Males

10545

M55-59

10545

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

13790

Males

9402

M55-59

9402

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

15374

Males

10027

M55-59

10027

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

14168

Males

9448

M55-59

9448

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

13760

Males

9219

M55-59

9219

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17163

Males

10650

M55-59

10650

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9265

Males

6925

M55-59

6925

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2story building
+22ft-21ft

Overall

7633

Males

5962

M55-59

5962

Passing Analysis

Category:
Athletes Passed
5040
Passed By
165
Net Change
+4875
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22033
5K → 10K100825+983#22033#21050
10K → 15K8435+838#21050#20212
15K → 20K6126+606#20212#19606
20K → Half796+73#19606#19533
Half → 25K33421+313#19533#19220
25K → 30K6390+639#19220#18581
30K → 20M19715+182#18581#18399
20M → 21M3085+303#18399#18096
21M → 35K9410+84#18096#18012
35K → 23M2249+215#18012#17797
23M → 24M1773+174#17797#17623
24M → 40K5559-4#17623#17627
40K → 25.2M1371+136#17627#17491
25.2M → Finish3330+333#17491#17158
TOTALS5040165+4875
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing