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BOSTON MARATHON 2023

Allison Cass

GA

Bib: 22531 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 39%
Masters (Masters Women)
#0 / 6539
Top 25%
Division (F45-49)
#0 / 1817
Top 28%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:28/mi
26:18
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:26/mi
52:29
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:21/mi
1:18:26
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:19/mi
1:44:17
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:21/mi
1:49:59
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:17/mi
2:10:05
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:24/mi
2:36:12
↑ 181↓ 1480.2%
138 ft elev
20M
8:19/mi
2:47:30
↑ 64↓ 500.2%
148 ft elev
21M
8:31/mi
2:56:01
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:59/mi
3:01:59
↑ 17↓ 861.7%
156 ft elev
23M
8:08/mi
3:12:10
↑ 23↓ 630.6%
116 ft elev
24M
7:51/mi
3:20:01
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:44/mi
3:26:38
↓ 200.3%
20 ft elev
25.2M
8:13/mi
3:29:28
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:20/mi
3:36:56
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:49:59
Pace8:23 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:46:57
Pace8:10 /mi
📊Negative Split: 2.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:0626:188:2826:18
8:28
-
10K
6.21 mi11:49:1752:298:2726:11
8:26
-0:02
15K
9.32 mi12:15:141:18:268:2525:57
8:21
-0:05
20K
12.43 mi12:41:051:44:178:2325:51
8:19
-0:02
Half
13.11 mi12:46:471:49:598:235:42
8:21
+0:02
25K
15.53 mi13:06:532:10:058:2220:06
8:17
-0:04
30K
18.64 mi13:33:002:36:128:2326:07
8:24
+0:07
20M
20.00 mi13:44:182:47:308:2211:18
8:19
-0:05
21M
21.00 mi13:52:492:56:018:238:31
8:31
+0:12
35K
21.75 mi13:58:473:01:598:225:58
7:59
-0:32
23M
23.00 mi14:08:583:12:108:2110:11
8:08
+0:09
24M
24.00 mi14:16:493:20:018:207:51
7:51
-0:17
40K
24.85 mi14:23:263:26:388:196:37
7:44
-0:07
25.2M
25.20 mi14:26:163:29:288:192:50
8:13
+0:29
Finish
26.22 mi14:33:443:36:568:177:28
7:20
-0:53

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

7:20 /mi

Average Pace

8:17 /mi

Slowest Pace

8:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

27:54

13% of race

Time at Steady Pace

3:09:02

87% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:16 /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 mi11:23:0626:188:2826:18
8:28
#17318
10K
6.21 mi11:49:1752:298:2726:11
8:26
#17517
15K
9.32 mi12:15:141:18:268:2525:57
8:21
#17293
20K
12.43 mi12:41:051:44:178:2325:51
8:19
#16871
Half
13.11 mi12:46:471:49:598:235:42
8:21
#16872
25K
15.53 mi13:06:532:10:058:2220:06
8:17
#16566
30K
18.64 mi13:33:002:36:128:2326:07
8:24
#16014
20M
20.00 mi13:44:182:47:308:2211:18
8:19
#15706
21M
21.00 mi13:52:492:56:018:238:31
8:31
#15403
35K
21.75 mi13:58:473:01:598:225:58
7:59
#15260
23M
23.00 mi14:08:583:12:108:2110:11
8:08
#15017
24M
24.00 mi14:16:493:20:018:207:51
7:51
#14802
40K
24.85 mi14:23:263:26:388:196:37
7:44
#14551
25.2M
25.20 mi14:26:163:29:288:192:50
8:13
#14458
Finish
26.22 mi14:33:443:36:568:177:28
7:20
#14170
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi173186137613716868(Top 63%)5828(Top 51%)5828(Top 321%)
10K6.21 mi3.10 mi17517-1996232-956232-9517771(Top 67%)6348(Top 56%)6348(Top 349%)
15K9.32 mi3.11 mi17293+2246090+1426090+14216868(Top 63%)5828(Top 51%)5828(Top 321%)
20K12.43 mi3.11 mi16871+4225849+2415849+24115733(Top 59%)5178(Top 45%)5178(Top 285%)
Half13.11 mi0.68 mi16872-15845+45845+416835(Top 63%)5781(Top 51%)5781(Top 318%)
25K15.53 mi2.42 mi16566+3065675+1705675+17014895(Top 56%)4762(Top 42%)4762(Top 262%)
30K18.64 mi3.11 mi16014+5525385+2905385+29013750(Top 52%)4184(Top 37%)4184(Top 230%)
20M20.00 mi1.36 mi15706+3085209+1765209+17612483(Top 47%)3576(Top 31%)3576(Top 197%)
21M21.00 mi1.00 mi15403+3035059+1505059+15010623(Top 40%)2696(Top 24%)2696(Top 148%)
35K21.75 mi0.75 mi15260+1434982+774982+7712018(Top 45%)3454(Top 30%)3454(Top 190%)
23M23.00 mi1.25 mi15017+2434848+1344848+13410750(Top 40%)2905(Top 25%)2905(Top 160%)
24M24.00 mi1.00 mi14802+2154733+1154733+11510211(Top 38%)2704(Top 24%)2704(Top 149%)
40K24.85 mi0.85 mi14551+2514608+1254608+1258306(Top 31%)1888(Top 17%)1888(Top 104%)
25.2M25.20 mi0.35 mi14458+934558+504558+507910(Top 30%)1822(Top 16%)1822(Top 100%)
Finish26.22 mi1.02 mi14170+2884403+1554403+1557355(Top 28%)1579(Top 14%)1579(Top 87%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

16868

Females

5828

F45-49

5828

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17771

Females

6348

F45-49

6348

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

16868

Females

5828

F45-49

5828

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

15733

Females

5178

F45-49

5178

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

16835

Females

5781

F45-49

5781

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

14895

Females

4762

F45-49

4762

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

13750

Females

4184

F45-49

4184

30K→20M

18.6 - 20.0 mi

Top 47%
×5story building
+64ft-50ft

Overall

12483

Females

3576

F45-49

3576

20M→21M

20.0 - 21.0 mi

Top 40%
×8story building
+106ft-24ft

Overall

10623

Females

2696

F45-49

2696

21M→35K

21.0 - 21.8 mi

Top 45%
×7story building
+17ft-86ft

Overall

12018

Females

3454

F45-49

3454

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10750

Females

2905

F45-49

2905

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10211

Females

2704

F45-49

2704

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8306

Females

1888

F45-49

1888

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

7910

Females

1822

F45-49

1822

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2story building
+22ft-21ft

Overall

7355

Females

1579

F45-49

1579

Passing Analysis

Category:
Athletes Passed
3761
Passed By
613
Net Change
+3148
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17318
5K → 10K216415-199#17318#17517
10K → 15K32399+224#17517#17293
15K → 20K45432+422#17293#16871
20K → Half3132-1#16871#16872
Half → 25K31913+306#16872#16566
25K → 30K56311+552#16566#16014
30K → 20M3113+308#16014#15706
20M → 21M3041+303#15706#15403
21M → 35K1441+143#15403#15260
35K → 23M2441+243#15260#15017
23M → 24M2172+215#15017#14802
24M → 40K2510+251#14802#14551
40K → 25.2M930+93#14551#14458
25.2M → Finish2913+288#14458#14170
TOTALS3761613+3148
📊

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